Skip to main content

Full text of "Proceedings and Report of the Belfast Natural History and Philosophical Society."

See other formats


my Naat 
ee 


Proceedings 


and Reports 


| | | 

i OF THE BELFAST 

8 NATURAL HISTORY O 
and = 
PHILOSOPHICAL 
 SOCLEEY= =": 


os ee 2 Sees 2 oe Go ee eee eee ee eee eee oe oe 


SESSION 
1924.95, 


Price : 
Two Shillings 


Belfast : 
THe NORTHERN WHIG, Lrp., Prinrers, Bripge Street 


1926. 


a i = = a TS, 


RECENT PUBLICATIONS 
OF 


ES OC Maa Ns 


CHNTENARY VOLUME 1821-1921. 

A review of the activities of the Society for 100 years 
with historical notes and memoirs of many distinguished 
members ; copiously illustrated (viii + 212). Compiled and 
edited by Arthur Deane, M.R.J.A., F.R.S.E., Hon. Secre- 
tary of the Society. 7/6. By post 8/-. : 


THE MONASTERY OF ST. MOCHAOIL OF NENDRUM, 

An account of the recent exploration of this Hiberno- 
Celtic Monastery under the auspices of the Society’s 
Archeological Section, with a history of the Monastery (A.D. 
440-1224) and many notes of archeological interest relating 
to Down and Antrim. “ Copiously illustrated (xxvii + 187). 
By EC. Lawlor, M.A\ RA... with -an- inberesmmne 
foreword by Professor Rh. A. S: Macalister: D. Litt.. D.Se. 
etc. 10/6, 


GUIDE TO THE RUINS OF NENDRUM MONASTERY. 
For use of Visitors to the site of the Monastery; 


illustrated. (12 pp.) By Major C. Blakiston-Houston, 
J.P. . One shilling. 


PROCEEDINGS AND REPORTS 


— OF THE — 


BELFAST NATURAL HISTORY 
AND PHILOSOPHICAL SOCIETY 


oa FOR THE = 


SESSION 1924-25. 


EDITED BY 
ARTHUR DEANE, F.RS.E., M.RLA. 
HON. SECRETARY. 


Belfast : 
THE NORTHERN Waic Lrp, Commerciat Buitpines, Bripce Srreer. 


1926, 


lil 


BELFAST NATURAL HISTORY AND PHILOSOPHICAL SOCIETY. 
[ESTABLISHED 1821. | 


CONSTITUTION. 
The membership of the Society consists of Shareholders, 
Annual Subscribers and Honorary Members. 


Shareholders holding more than two shares are not liable 
for an annual subscription, but shareholders of two shares pay 
an annual subscription of five shillings, and holders of one 
pay ten shillings. 

In 1914 a new class of membership was created 
including persons of either sex. to be elected under the bye- 
laws of the Society, and admitted by the Council on payment 
of ten shillings per annum. Such members have all the privi- 
leges of the Society, and take part in any business of the 
Society not affecting the ownership of its property. In 1917 
an Archaeological Section was founded. Persons wishing to 
join the Section must be members of the Society and pay 
an additional minimum subscription of five shillings per 
annum. An Application Form for Membership to the 
Society and to the Section will be found on page vii. 

A general meeting of Shareholders and Members fs held 
_ annually to receive the Report of the Council and the State- 

ment of Accounts for the preceding year ending 31st October, 
to elect members of Council, to replace those retiring by 
rotation or for other reasons, and to transact any other busi- 
ness incidental to an Annual Meeting. 

The Council elect from among their own number a Presi- 
dent and other officers of the Society. 


Each member has the right of personal attendance at the 
ordinary lectures of the Society, and the privilege of in- 
troducing two friends for. admission to such. 

Any further information required may be obtained from 
the Fon. Secretary at:--The Museum, College Square 
North, Belfast. 


CONTENTS. 
Pages. 
Morton, Prof. W. B., Lord Kelvin aA Rin oS) 
Mur, A. Ey Christopher ~Plantim)) Printer .ol 
Antwerp, 1520-1589 ce a, ... 10-14 


Johnson, R. C., Spectroscopy and its Applications ... 15-28 
Annual Meeting of Society ee coe ... 90-84 


Annual Meeting of Society: Archaeological Section 35-40 


List of Exchanges Es es es .. 43-46 
List of Shareholders and Members Ay eo Ie ao 
List of Past President ... sig cas ae VI. 
Meinbership Application Form ... a Boe Note: 
Ofticers amd Council. 1925-26" Me oe AG 


Statement of Accounts ae ae at Agee 


Vv. 


BELFAST NATURAL HISTORY 
AND PHILOSOPHICAL SOCIETY 


Officers and Council of Management for 1924-25. 


firesident : 
ProFessorn W. B. MORTON, M.aA., M.R.I.A. 


Vice-jresidents : 
Sir CHARLES BRETT, t1.p. 
S. W. ALLWORTHY, m.a., M.D., F.c.s. 
Pror. GREGG WILSON, o.8B.E., M.A., D.SC., PH.D., M.B.I.A. 
ROBERT M. YOUNG, J.P., M.A., M.R.LA. 
J. M. FINNEGAN, B.a., B.sc. 
WILLIAM SWANSTON, F.e.s. 


Wan. Treasurer: 
W. B. BURROWES, F.z.s.a.1. 


Bon. Hibrarian: 
ROBERT M. YOUNG, g.p., M.R.1.A. 


Gon. Secretary: 
ARTHUR DEANE, m.z.1.4. 


@ouncil : 
SIR CHARLES BRETT, tu.p. 
T. EDENS OSBORNBE, r.r.s. 4.1. 
S. W..ALLWORTHY, M.a., M.v., F.c.s. 
WILLIAM FAREN, F.z.s.a.1. 
ARTHUR DEANE, m.r.1.A., F.R.S.E. 
W. B. BURROWES, r.r.s.A.1. 
EK. J. ELLIOTT. 
H. C. LAWLOR, M.a., m.r.1.a. 
WILLIAM SWANSTON, r.cas. 
PRoFEssorn GREGG WILSON, p.sc., M.n.1.A. 
John M. FINNEGAN, B.A., B.SC. 
PROoFEssor W. B. MORTON, m.a. 
F. ADENS HERON, D.L., J.P:, F.R.S.A.I. 
ROBERT M, YOUNG, M.a., M.R.LA 
Ricur Hon. 8. CUNNINGHAM. 


Retire 1925, 


Retire 1926. 


Retire 1927. 


-—-+- a ~—— -n- goey S- +--+ 


1821-22. 


1822-27. 


1827-4-. 


1843-52. 
1852-54. 
1854-56. 


1856-58. 
1858-60. 
1860-61. 
1861-63. 
1863-64. 


1864-66. 
1866-68. 
1868-69. 
1869-70. 


1870-71. 
1871-74. 
1874-77. 


1877-79. 
1879-81. 
1881-83. 


*Died during their Presidency 


vi 


PAST PRESIDENTS. 


James L. Drummond, 
M.D. 


Rev. T. Dix Hincks. 


James L. Drummond, 
M.D. 


*Wm. Thompson. 
Robt. Patterson, F.R.s. 


Thos. Andrews, M.D., 
F.R.S., M.R.I.A. 


John Stevelly, iu.p. 
George C. Hyndman. 


*Jas. McAdam, F.R.s. 


Robt. Patterson, r.R.s. 


Prof. Wyville Thom- 
son. 


Prof. Jas. Thomson. 
Joseph John Murphy. 
Robt. Patterson, F.R.S. 


Prof. Wyville Thom- 
son. 


Robt. Patterson, F.R.s. 
Joseph John Murphy. 


Prof. J. F. Hodges, 
M.D. 


Robert Young, c.x. 
Prof. John Purser. 


Sir R. Lloyd Patter- 
son, F.L.S. 


1883-85. 


1885-86 


1886-89. 
1889-91. 


1891-94. 
1894-96. 


1896-98. 


1898-00. 
1900-93. 
1903-06. 


1906-08. 
1908-11. 


1911-15. 


1915-19. 


1919-21. 


1921-23. 


President 1923. 
Professor W. B. Morton, M.A., M.RB.I.A. 


Prof. R. O. Cunning- 


ham, M.D. 

Wee kl, 
M.R.I.A. 

Prof. E. A. Letts. 

Je H. Greenhill, 
MUS.BAC. 

Prof. M. F Fitzgerall 

Sir R. Lloyd Patter- 
son, F.L.S. 

Prof. J. D. Everett, 
¥.R.S.,)D-Col. 

*‘Nhos. Workman, J.P. 

John Brown, F.R.S. 

Prof. J. Symington, 
M.D., F.R.S. 

Sir Otto Jaffe, Lu.p. 

Sir John Byers, m.a 
M.D., M.A.O. 

Prof. J. A. Lindsay, 
M.D., F.R.C.S. 

Prof; W.. St. Clair 
Symmers, M.B. 


Prof. Gregg Wilson, 
0.B.E., M.A., D-SC., 
PH.D., M.R.I.A. 

*Henry Riddell, m.z., 
M.I.MECH.E, 


Patterson, 


ee 


vil 
Belfast Natural History and Philosophical Society. 


Founded 5th June, 1821. 


Application Form for Membership. 


Name etG.a..0:. 3: Me ae es cick Ree ie oe eee 
[Please write name in full. | 


DESCRIPTION, 9 eee elite nad a ioe rom re aa aren 
To be filled 
up by the 
Candidate. JENEYSUIS (Sh aK GE exact serie iam eR nS Oe AIOE 
jo 35 uageaee aes eet ere arias , being desirous of becoming a Member 
of the Society. I, the undersigned member, recommend........ 


as a suitable candidate for election. 


Dated this.......... GO, Of ee teas teens sna oe Io Wee 


Signature of 
Member Cor eeeo+ceoeors er eee eree re eecreseeecer Se ecoeseseaese re 


[Candidate must be known to the Member signing this form. ] 
[All applications are subject to the approval of the Council.] 


Recelved. -.... ene Filected by 
Council 


@eeeseerexe2eeceseanpeeee2x2e0@ 


Vill 


CONSTITUTION OF SOCIETY. 


The membership of the Society consists of Shareholders, 
Annual Subscribers and Honorary Members. 

Shareholders holding more than two shares are not liable 
for an annual subscription, but shareholders of two shares 
pay an annual subscription of five shillings, and holders of 
one pay ten shillings. 

In 1914 a new class of membership was created 
including persons of either sex, to be elected under the bye- 
laws of the Society, and admitted by the Council on payment 
of ten shillings per annum. Such members have all the privi- 
leges of the Society, and take part in any business of the 
Society not affecting the ownership of the property of the 
Society. 


ARCHAEOLOGICAL SECTION. 


Persons wishing to join the Archaeological Section must 
be Members of the Society, and pay an additional minimum 
subscription of five shillings per annum. State below if you 
wish to join this section. 


I desire to join the Archaeological Section. 
Signature ) 


of pos cagetiona acta: We ee | 
Candidate | 


[All applications for Membership to the Section are 
subject to the approval of the Archaeological Committee. | 
This form, when filled in, should be addressed to the 
Hon. SECRETARY, 
B. N. H. & P. Society, 
THE Museum, 
CoLLEGE Square N. 


Belfast Natural History and Philosophical Society, Session 1924-25, 


Lorp KELVIN AT THE AGE OF 22. 
From the Jubilee Commemoration Volume. 


Lorp KELVIN AT THE AGE OF 82. 
From Prof. 8. P. Thompson’s ‘‘ Life.’’ 


[See also Plates following Page 9. ] 


Lord Keluin i 


PROCEEDINGS OF THE BELFAST NATURAL 
HISTORY AND PHILOSOPHICAL SOCIETY. 
SESSION. 1924-25. 


QO—_-- -—-—= 


4th November, 1924. 


In Museum, College Square N., 


PRESIDENTIAL ADDRESS, 
LORD KELVIN. 


By Proressor W. B. Morton, M.A., M.B.J.A. 


Any account of Wiliam Thomson, Lord Kelvin, must 
begin with his father, James Thomson. There is a special 
reason for this, over and above the interest which attaches 
to the heredity of a great man. When genius has appeared 
in the world it has often had a double task to perform; to 
free itself from a cramped and unfavourable environment 
and then to do its special work. In the case of the Thom- 
sons these tasks were divided. It was the father who broke 
away from the farm in County Down where his ancestors 
had lived for four generations. By his ability and force of 
character he made a place for himself in the world of learn- 
ing, and a home filled with eager interest in the things of 
the mind. In such surroundings the genius of the son found 
everything favourable to its rapid development and full ex- 
pression. So, in a way, the two lives seem to combine into 
a continuous whole, the hfe of strenuous preparation 
followed by the life of splendid achievement. 


The way to knowedge was opened for James Thomson, 
as it has been for many another farmer’s son, by a scholarly 
country minister. The Thomson home was near the Spa at 
Ballynahinch, and at Ballykine, not far away, a school was 
opened by the Rev. Samuel Edgar, the minister of the 
Secession body of Presbyterians in that district. He was a 
man of note in his day and was afterwards chosen to be 


2 Professor W. B. Morton on 


Professor of Theology at the College in Belfast. He was 
succeeded in his chair by his son John Edgar, the well-known 
philanthropist, and in Ballynahinch, at church and school, 
by another son, Robert Edgar. James Thomson became an 
assistant teacher in the school, and entered the University 
of Glasgow, spending the winter there in four sessions while 
supporting himself by teaching at home during the suc- 
cessive vacations. He wrote a series of text-books, in par- 
ticular an arithmetic which was used by many generations 
of Irish schoolboys. When the Belfast Academical In- 
stitution was opened in 1814, he ws the first teacher of 
mathematics, and was shortly afterwards promoted to the 
Professorship in the Belfast College. He built two houses 
in College Square East, one of which, No. 17, he occupied. 
In 1832 he was called to the chair of Mathematics in 
Glasgow. His second son William was then eight years of 
age. 


Two years later, at the ripe ages of ten and twelve, 
William Thomson and his elder brother James matriculated 
in Glasgow University. So great was their precocious 
ability and so thorough the preliminary education received 
from their father that they were able te profit by the Cellege 
classes and to win prizes in competition with older students. 
It is to be remembered that Scottish lads in those days 
went to College at earlier ages than 1s now the custom. For 
the Thomson boys the College took the place which the 
school does for the ordinary boy; and when William, who 
proved himself to be the more brilliant of the two, went up 
to Cambridge at the age of 17 his knowledge and maturity 
of thought placed him in a different class from the ordinary 


undergraduate even of the best type. Notwithstanding 
this, he entered into the life of the place with the zest of 
the normal undergraduate. ‘‘ Thomson of Peterhouse ”’ 


was one of the founders of the ‘* University Musical 
Society ’* and played the cornet; he went in for rowing, and 
won the “‘ Colquhoun Sculls.” Meanwhile he was con- 
tributing original papers to the “‘ Cambridge Mathematical 
Journal,’’ signing them “ P.Q.R.,”’ as if to avoid by this 
anonymity any assumption of superiority over his fellows. 
At the Tripos of 1845 he was second Wrangler, being 
beaten by a man who had been practising the rapid writing- 
out of examination answers while his great rival was adding 
to knowledge by his researches, 


Lord Keivin 3} 


Meanwhile at Glasgow Professor James Thomson was 
planning the future career of his brilliant son. The Pro- 
fessor of Natural Philosophy, Dr. Meikleham, was very old 
and infirm, and had been obliged, even before William went 
to Cambridge, to delegate his work to substitutes. <A 
vacancy in the chair was bound to come soon, and the father 
was determined that the son should be in all points qualified 
to fill it when the time came. Accordingly in the year 
following his graduation William was sent to Paris to make 
the personal acquaintance of the French mathematicians 
and physicists, among whom his work was already known, 
and to widen his experience in the experimental side of 
Natural Philosophy. Everything fell out as it was hoped. 
In 1846 the chair fell vacant. The application sent in to the 
electors by the young man of 22 was accompanied by testi- 
monials from all the greatest scientific men of Britain and 
France and by a list of 26 original papers already published. 
His election was unanimous, and so began the greatest 
scientific professorship of all time. I lasted till 1899, when 
at the age of 75 Lord Kelvin resigned his chair and enrolled 
himself as a ‘‘ research student ’’ of Glasgow University. 
It was a quaint fancy on the part of the veteran man of 
science, but ‘‘ research student ’’ ecntinued to be a correct 
description up to the very end of his life. For eight years 
he continued to think and to write, both on those funda- 
mental questions which had always occupied his mind, and 
on the new subject of radio-activity, which was to bring 
such profound modification in our views on the structure of 
matter. 

It was a life of singular unity, consistency and com- 
pleteness. Except for the adventure of the Atlantic cable, 
it was outwardly uneventful. But the mental life was 
lived at the unresting speed of genius, a life full of excite- 
ment, of eager search and discovery, of intense and wide 
interest, of constant give and take with other minds, of 
splendid service to humanity. 

In attempting to give scme account of this long life of 
thought, action and uence IT shall speak of his work, first 
in abstract Physical Science, then in the application of 
Physics to practical ends, and las stly of his personal influence 
on his contemporaries. His especial greatness lay in the 
close union of the discoverer, the inventor and the teacher, 


4 Professor WV B. Morlon on 


His advances in theoretical Physics were based on an 
intimate knowledge of the work oi the great school of French 
Mathematical Phy sicists. While still a boy he had made 
himself acquainted with the writings of Lagrange, Laplace 
and Poisson, and just before leaving Glasgow he had eagerly 
read the work of Fourier on the theory of Heat- conduction. 
Nowadays the student at a University derives his knowledge 
from text-books which systematize the results obtained in 
the different branches and make it possible for the. average 
man to gain a knowledge of a fairly wide range. In those 
days before text-books the average man learned vothing at 
all of advanced subjects, but the ¢xceptional man, who was 
able to read the original authorities, derived a much oreater 
insight and inspiration from his contact, at first hand. with 
the thought of a master-mind. This was the case of Wilham 
Thomson. There were three books of which he always 
talked with a grateful enthusiesm, viz., the work of Fourier 
‘just mentioned, “‘ Théorie Analytique de la Chaleur,”’ 
Carnot’s ‘‘ Reflexions sur la Puissance Motrice du Feu,’ 
and Green’s *‘ Essay on the Application of Mathematical 
Analysis to Electricity and Magnetism.’’ The secoud and 
third were books which he himself discovered; bemg in 
advance of their time they had oe failed to obtain 
recognition, and had been forgotten. All three exercised a 
profound influence on the work of Thomson. Fcurier’s 
work formed the starting point of researches on the conduc: 
tion of heat in the ons of the Earth, which led to un 
estimate of the length of time required for the globe to 
cool down to its present condition. This produced a famous 
controversy with the geologists whose views on the age of 
the Earth required a much more libera} allowance of time. 
The dispute has lost interest now, since the discovery of a 
new source of heat in the radioactive minerals. Of much 
greater importance was the work insvired by Carnct; work 
which made Thomson rank along with the Germans Helm- 
holtz and Clausius, as one of the founders of the Science of 
Thermodynamics. At the time when he entered on his 
professorship the caloric theory still held the field, according 
to which heat was an impoaderable and indestructible fluid. 
The experiments of Joule, carried out about that time, sup- 
norted the modern view that heat was a form of energy, a 
view which had been put forward earlier, on theoretical 
grounds, by Mayer. Thomson was greatly impressed by the 


Lord Kelvin 5 


work of Joule, with whom he formed a close personal friend. 
ship. For some time, however, he hesitated to aceept the 
new theory as to the nature of heat, because the argument 
of Carnot regarding the efficiency of heat-engines wa: based 
on the caloric theory, and led to xesults of undoubted 
viuidity. Ultimately he was able tc reconcile the conflicting 
points of view and establish definitely the laws which govern 
the transformation of heat into mechanical work. 


In Electricity his earlicst work was occupied with the 
way in which electric charges Cistribute themselves over 
conductors. In this connexion he devised, while vet an 
undergraduate, a quite original method of great beauty and 
power. Afterwards he wrote anl1 experimented ir many 
departments of Electrical Se:ence including the nature of 
Magnetism and the propagation of electric signals along 
cables. He was the first to deduce the existence of the 
electrical surgings in which the waves of ‘“ wireless ’’ have 
their origin. He was mainly instrumental in settling the 
system of electrical units, and he founded the science cf 
exact electrical measurement by his many designs of instru- 
ments. His laboratory was the first in which research work 
on electrical and other properties of matter were carried out 
by a band of advanced students. 

Lord Kelvin’s most absorbing interest on thecretical 
matters was the nature of the aether. ‘This subje¢t was 
never far from his thoughts, and he returned to it again 
and again throughout the whcle of his life. The object of 
his search, one which occupied the minds also of ‘all his 
great contem :poraries, was a mechanical aether which would 
‘“work.’’ To explain, we go back to the origin-of the wave- 
theory of light founded by Huygens in the 17th certury and 
by Young at the beginning of the 19th. This thecry had 
its foundation in the fact that many of the vhenomena of 
light were analogous to those which could be preduced by 
wave-moticn through a medium. The theory was dev eloped 
mathematically by. Fresnel, and the agreement with ob- 
servation was £o satisfactory that belief in the real existence 
of the hypothetical medium became absolute But the 
aether was found to be strangely elusive when attempts 
were made to penetr ate into its inner nature, tc imagine how 
its parts moved in transmitting the light-waves, to find out 
is relation to ordinary matter and to the phenomena of 
electricity and magnetism. All the ‘‘ models ’’ which wer« 


6 Professor W. B. Morton on 


devised failed in some respect, that is to say, the behaviour 
deduced from the supposed mechanical properties of the 
medium did not agree with the observed behaviour of light, 
Lord Kelvin towards the end of his life confessed to a sense 
of failure in this life-long effort, but he did not labour in 
vain. Not only did results of great value in Mathematical 
Physics accrue from his investigations, but also. by his 
thorough exploration of the possiblities in this region, he 
left physical speculation in our day free to try other paths, 


In the bronze statute by Mr. Bruce Joy which stands 
in our Botanic Gardens Park, Lord Kelvin holds in his hand 
a piece of paper on which is a diagram of four linked 
gyrostats. This recalls his great interest in Dynamics, the 
sclence of motion and force, and specially in the thecry of 
spinning motion. His work on this subject is embkcdied in 
the classical treatise on ‘‘ Natural Philosophy ’° written in 
collaboration with his Edinburgh colleague, Prof. P. G. 
Tait. This was intended as a first volume of a large work 
which should extend over all departments of Physics. The 
larger scheme was abandoned, partly on account of the 
other pre-occupations of the authors and partly because the 
ground was covered by separate works like Lord Rayleigh’s 
“Sound ”’ and Maxwell’s ** Electricity and Magretism.”’ 
As it stands the book is unique in its profound and ex- 
haustive treatment of the subjects which form the founda- 
tion of all Physical science. The designation “* Thomson 
and Tait ’’ is usually replaced by the contraction “‘ T and 
T/’’ which is due to the writers themselves. In thei cor- 
respondence they began their letters with ““O T’’ and 
“ OT’ instead of the conventional openings. 

It was Lord Kelvin’s work in connexion with the laying 
of the Atlantic cable which brought him into the greatest 
public prominence and led to his knighthood in 1866. 

There could have been no success but for his profound 
knowledge of theory, bis patient investigations and his in- 
ventions, but his triumph was one of character as much as 
of intellect. He had to contend with ignorance, incom- 
petence and perversity, under conditions which would have 
been intolerable to a !esser man or a man less single-minded. 
The story of the cable has often been told. At the beginning 
Professor Thomson occupied a curious and rather anomalous 
position. He accompanied the expeditions, not to advise 
as a physicist, but to represent the interests of the Scottish 


vi 


Lerd Kelvin i 


shareholders. He put his knowledge and skill freely at the 
disposal of the engineers engaged in the work of laying the 
cable and when at last this was accomplished in the face cf 
enormous difficulties he was obliged to stand by and see the 
eable destroyed through the frocedure of the official 
electrician of the company. ‘The problem to be solved was 
the production of readable signals by means of electric 
currents sent through the large resistance and capacity of 
the great length of conductor. The electrician, Whitehouse, 
was the patentee of certain receiving apparatus of rather 
clumsy construction which could be actuated only by corm- 
paratively iarge currents. His idea was to send into the 
cable currents of very high voltage, which had the effect of 
breaking down the insulation and rendering the cable use- 
less. Thomson saw clearly that the only” solution of the 
problem lay in devising receiving apparatus which would 
respond to the weakest currents. For this end he devised 
his mirror-galvanometer, and later his siphon-recorder. In 
the former the reception of minute currents was shown by 
the movement of a spot of light along a scale in a darkened 
room, the light being reflected from a small and delicately 
suspended mirror. On-the back of this mirror a fragment 
of magnetised watch-spring was moved by the current in a 
surrounding coil. In the siphon-recorder a light coil through 
which the current passed was suspended between the poles 
of a strong magnet. From a fine tube attached to the coil 
a jet of electrified ink was squirted on a travelling strip of 
paper giving a wavy line from which the Morse signals could 
be read. 


In 1865 the attempt was renewed with Thomson as 
chief consultant, the ‘‘ Great Eastern ’’ being used as cable- 
ship. In that year there was a break in mid-ocean, but the 
following year not only was a new cable successfully laid 
from shore to shore, but the broken cable was recovered and 
completed. As a demonstration of the delicacy of the 
recelving apparatus messages were sent and read at Valencia 
going out along the one cable and back along the cther, the 
two being joined in series for the occasion, by means of a 
battery made of a lady’s silver thimble containing acid and 
a small piece of zinc. 

Of even greater practical benefit were Juord Kelvin’s 


services to the art of the nav igator. He was made personally 
familiar with the problems to be solved through his ex- 


S Professor W. B. Morton on. 


perience as a yachtsman, ali his leisure time in summer 
being spent on board his famous schooner the “‘ Lalla 
Rookh.’’ His compass, his sounding-apparatus, his tide- 
recorder and tide-predicter came from his interest in all 
matters concerning the sea. 


Lord Kelvin had to engage in litigation in connexion 
with his compass-patents. His opponent was a well-known 
Belfast man of a past generation, Mr. F. M. Moore. It is 
told that durmg the hearing of the cese one of the judges, 
perplexed by the extremely technical character of the 
evidence, enquired of counsel if it could not be possible to 
explain the point at issue without bringing in the earth’s 
magnetic force ! 

In connexion with the taking of soundings at sea a 
great Improvement was effected by the introduction of steel 
piano-wire to take the place of rope. Along with this there 
were ingenious devices for paying-out or hauling-i in the lead 

and a depth- indicator on which the pressure of the water 
was made to compress a spring and so leave a record of the 
createst depth reached. ‘The tide-recorder was a device for 
cbhtaining an automatic ee record of the varying height 
of the sea at a given place. Having obtained this for a 
sufficient period ‘of time the record was mathematically 
analysed and the sequence of future tides predicted. 


When we come now to consider Lord Kelvin’s work as 
a teacher we are met by a limitation which was a con- 
sequence of his type of genius. The crdinary students who 
formed the great bulk of his classes at Glasgow were able 
to learn almost nothing from his lectures, though thev can- 
not fail to have been impressed by his personality. In the 
scientific army he was chief of staff with nothing to say to 
the common soldier. In his lectures he was unmethodical 
and erratic, constantly deviating from the matter in hand by 
some side-issue which he oul follow up enthusiastically, 
generalising, surmising and extending, while his audience 
gave up all hope of understanding, His scientific papers 
give the same impression of a mind imoving. with extra- 
erdinary rapidity among new ideas, too eager to rnake fresh 
discoveries to give much thcught to the clear presentation 


of the results already won. He was at his best in the com-- 


pany of other investigators in Physical Science. The 
ceecasion on which he expressed himself most fully on the 
perennial problem of the aether was when he gave, in 1884, 


Site 


eit 


Belfast Natural History and Philosophical Society, Session 1924-25. 


Cottece Square East, BrLrast, SHOWING BIRTHPLACE OF 


Lorp Kenivin. Site now occupied by ‘‘Kelvin Picture House.”’ 


The two houses on left of street lamp were built by Professor James 
Thomson. The first house was Lord Kelvin’s birthplace. His 
elder brother, James Thomson, was also born there. 


(Reprinted from the Society’s Centenary Volume, 1821-1921). 


< 
Ge 
i>) 
= 
< 
Ve 


£4 


SS} 
(ee 
Of 
on 
WY) 
cf 


Belfast Natural History and Philosophical Society, Session 1924-25. 


Photo: A. R. Hogg. 


Str Wm. THomson, Baron Ketvin or Laras, O.M., G.C.V.O., P.C. 
Born Belfast, 1824, Died at Largs, 1907. 
Buried in Westminster Abbey. 


[From a bronze statue by A. Bruce Joy, 1913, in Botanic Gardens 
Park, Belfast. | 


- Belfast Natural. History and Philosophical Society, Session 1924-25. 


P= ORD KELVING — : \ 
— PAPERS & PATENTS. H 
-20 i 


1340 50 60 270 80 So) (900 


‘| WONDERFUL GARDENS 
OF MOUNTSTEWART. 


BELFAST FIELD CLUB VISIT. 


‘ 

BALLYWALTEWS LAUGHING JACKASS. 
| Once again the Belfast Naturalists Field 
Club have held the record excursion for a 
‘N.F.C, in the British Islands, this time 
whole day affair last Saturday. d Their 
former outstanding affair was an after- 
‘noon visit only to Hillsborough Castle, 


| demesne. and fort, and on that occasion 198 


ieurmedl up. the hon. secretary, Mr. N- H. 


‘Foster, F-L.S., M.R.LA., and Mrs. Foster 
lentertaining the party to tea. 
: Leaving the Old Museum of Saturday 
morning shortly after ten o'clock, three 
s-charabanes | 0! 
Be taok 100 ‘of the party, about ‘80 extra 
travelling in their own cars, of which there 
were 18 present. On arrival at Mount- 
stewart they were met by Mr. Bolas, the 
head gardener, who pointed out the various 
interesting trees and shrubs: along the 
avenue, including a very fine and tall 
Mediterranean heath and a great Pinus 
SI@NIS- 
pntering the pergola round the sunk 
arden, both it and the extension—the Red 
fland of Ulster garden—delighted the 
party. Among the many woe here on 
the terrace or at the east en of the Italia 
near the Noah's Ark and: Dodo 


garden, v 
illars, wera big Eucalyptus trees, 
calyptus globulus, the blue gum of 


Australia growing here to a height of 85 
feet, the two largest clipped bay trees in 
the British Isles, tivo very fine Florence- 
court yews, and a big, New Zaland tree fern 
which Mr, Bolas told the party was quite 
hardy at Mountstewart. : F 
With these were many rare or interesting 
rock and other plants, inchiding the rare 
Galifornian shru Dendromecon rigidum, 
with its big yellow flowers. The pergola’ 1s 
\planted with tiventy species or varieties of 
‘Nustralian and New Zealand ‘acacias, the 
Club palm, Cordyline australis ; the Chusan: 
{nalm, Chamaerops humilis; ginger plant, 
|Hedychium ° Greenii; Japanese banana, 
Musa japonica; Jerusalem sage, Phlomis 
fruticosa; Chilian nut, Guevina avellana; 
cork tree, Querciis subes; bottle brush tree, 
Joquat, Briobotrya; Vi- 
thytidophyllum | from China ; 


/aCCASION, 


EOHS OF POTEEN-MAKING DAYS. 

After a visit to Lady Mary's tea- 

with its doyecote and two old ne ene 

stones,’ formerly used for crushing barley 

for Pores making, and still used on many 

small’ farms for bruising young whins for 
horse-feeding, a fine example was seen of 

a rat-proof and cat-proof bird-house on 

a tall column, and some more of the quaint 

reproductions of extinct animals of which 
many had heen seen at the east terrace 
ingluding thes pisrodactsy, &e., and. the 

low extinct Irish greyho: i 

aye pee greyhound pig on wall 

some of the oldest members remembered 
seeing it in tlie sixties and seventies of Thee 
century still existing in Donegal, Mayo, &c. 

After a visit to a cork tree the next stop 

was at Ballywalter Park, to visit Lady 
Dunleath’s bird aviaries, rock garden, and 
bird pond, where many interesting birds 
Were seen in largé open-air aviaries, or in 
the wired-in area round the bird pond. 
Among the birds in No. 1 aviary were 
Australian flock doves and blue-eye doves 
(both have bred this season), palm doves, 
snow bunting, red’ Hand’ and Zebra finches, 
cutthroats, bulfinch, goldfinch. In No. 2 
| Australian and other finches, spire birds 
Dlackheaded and whiteheaded news, cordon 
bleu, masked doves, redpoles, Pekin robins 
tibbon finches, &e. Outside there are 
trumpeters, Austraian piping crows, karra- 
corrys, tinemon, Californian quail, Brazil 
jays, Many species of duck in pond, black 
swans, and a white rhea. In the rockery 
was seen New Zealand ferns, wild small 
white foxglove from the Alps, soldanellas, 
vincetoxilim officinalis, and many other 
plants from the Alps and Pyrenees. 

While the party were Jlunching here 
under the shade of many big trees a stately 
white rhea and a number. of water birds 
made their appearance, walking abont 
among them, to the special delight of the 
young folk, many members of the junior 
section of the club being present. 


2 AU SHENG JACKASS HEARD. 
je caretaker of the bird: s - 
ately able, before all the SNe NE IE 
the avaries, to let quite a number, mostly 
of the junior section, hear the Jaughin, 


Fo 
INVASION OF THE ARDS. 


jackass at its best, the weirdest 
eo a bird they had ever heard Heike 


West End Cafe 
a nice bathe 
nior members 


ied 
\ iniors visited the 
nm: outlying reef. i | 
from SEE A 


‘as held on 


a 
de-| 


LUNAR RAINBOW AT ORLOCK HILL. 
Sir—On Saturday night last a ver, fine 
lunar rainbow was seen about halt past | 
eleven from Orlock Hill. It was a perfect 

bow, and several colours were visible, pink ~ > 
and’ blue clearly so. It remained visible 
for about half an out to the north-west 
of the Hill, the moon heing behind or sonth- 
east of our house. A fain lon of 


ib i 
scan p eae alae blots 

families, a tye riking, that on 
A\party stopped their motor SE ERaIReN Le 
to see it more distinetly.—Yours, etc. 
ALICH GLENDINNING, 

Ovlock, Go. Down. 9 : 
[We hve had letters from séveral oter 
correspondents fo the sanie- effect: 


ANhe, 


SCORED SOME NOTAB 
ERLEY" RACE BY OVER Two 
RLEY, MR. J. HAV'S KENIL~- 

MONTROSE FOURTH. 


BRITISH 
| MUSEUM 


| NATURAL | 
LoISTORY.J 


ome 


on 1924-25. 


2ssl 


5 


Society, 


and Philosophical 


Natural History 


Belfast 


In. 


ther of Lord Kelvi 


Bro 


1892 


led 


D 


From a photograph taken in 1878. 


1822 


n 


Bor 


ty’s Centenary Volume, 1821-1921), 


cle 


ted from the So 


(Reprin 


oe 


y 
S ; $ 3 f ! | 
— $\ o - ; . 5 ‘ : ie ; : 
[eee nen ; : fate heen Up eas aoe ; 5 ine 
7 A re 2 . r ‘ = Pr f ; eS ae = : : 
| 7 a | ¢ f 4 4. a eo 3 
— = 1 | 2 | 
= ; a \ si } ; 7 
/ A : 
= vs | ; : < : | 2 
ms 2 : : . | | 
pie | = | 
: ay 2 . c: , : 2 7 ; 
: . ; ‘ 4 ‘ 38 3) r zl 
i 4 = . : : , 
t s & 3 i ae ; : : 
lie : : z d : : | | | : 
j Ls 3 3 | ? | | 
Pas r= : : . : | | | 
: | i i E 4 
5 / : 7 | | 3 | 
- Hf | | 
. ‘ ‘i 5 | 
5 f Z a | . ) | 
‘ = rs : | 
| | . : i 2 . 3 eat 
=. ¢ i o Ni 2) = : : : 
i : : . x. : ; © 2 : 
1 ~ , x 7 > ‘a : : : } 
4 | | 
= J ZI : | | | 
Y Ip te} , ; ; ni j % | 
ee : ae E Wk Eye eg! : / 
5 SBeer ) j Sirs ie z is 
: ; y f ii = ; 
: : 5 1 = . if G 3 = ; 7 : 
= on C 2 . 7 
- se : ay "i ; ; : 3 | 
, a 7 - oa : | : 
~ oo ee ISS Re ae 42 Ly. = 5; = : : ; | : 2 : | 
fae: Sele peace eo 
i - ; eee < - zo z 3 ig : 


Lord Kelvin Q 


a series of twenty lectures at the John Hopkins University 


in Baltimore. Here he had an audience of accomplished 
physicists from American Universities with one or two from 
England; his “ twenty-one co-efficients ’’ as they were 
called, in reference to the twenty-one quantities so desig- 
nated in the theory of elasticity. During the course there 
was a free interchange of suggestions and fruitful co-opera- 
tion between the lecturer and the audience with the resuit 
that much fresh hght was thrown on a difficult subject. A 
verbatim report was taken by one of the audience who was 
an expert shorthand writer as well as an able mathematician. 
This was much expanded by Lord Kelvin, and published as 
a volume ten years later. 


Lord Kelvin was as much beloved for his character as 
he was revered for his genius. He was for a large part of 
his life the acknowledged leader of Physical Science in 
Britain, but he never showed a trace of arrogance or assump- 
{ion of superiority to other workers. Lord Rosebery on one 
occasion spoke of his “* laborious humiulity.’’ He was always 
ready to listen to others and to learn frem them. To voung 
men he was ready with encouragement and a charmiag 
courtesy, without a hint of condescension. In th: midst of 
his busy life he would willingly go arywhere to lecture or 
take part in a conference. He enjoyed intercourse with his 
fellows, at meetings of the learned Societies or elsewhere. 
It is impossible to estimate the value of the influence he 
exerted and the inspiration of which he was the source. 
Although he left this country at a very early age he always 
called himself an Ulsterman. We may surely call him the 
sreatest Ulsterman. 


The lecture was ‘llustrated by portraits of Lord Kelvin 
at different periods of his life, and also of his father and his 
brother James Thomson, Prefessor of Engineering at Belfast 
and afterwards at Glasgow. Views.were shown of gorne 
pieces of apparatus. of the old and new Colleges at Glasgow 
and scenes connected with the Thomscn family at Ballyna- 
hinch. The lecturer expressed his indebtedness to Mr. R. 
B. Bailie, of Ballynahinch, an authority on local history, 
who had given him much information and also to Mr. R. J. 
Welch, M.Sc., who had taken the photographs at Ballyna- 
hinch, 


0) A. H. Muir on 


9th December, 1924. 


In Museum, College Square North. 


Proressor W. B. Morton, M.A., M.R.1.A., President, 
in the Chair. 


AL Murry CaN 4 


“ CHRISTOPHER PLANTIN,”’ 
Printer of Antwerp, 1520—1589. 


In the heart of the City of Antwerp is found the Musée 
Plantin-Moretus. It is a printing works which was in the 
ecntrol of one family from its foundation in 1555 until the 
year 1870, a period of more than 300 years. It contains the 
records of the firm since its earliest days, with the old print- 
ing plant intact, and is an example of the house and works 
of a famous printer of the sixteenth century. It was pur- 
chased from the representative of the family in the vear 
1870 by the municipality of Antwerp and is inainta‘ ned as 
a Museum. 


Christopher Plantin, the founder of the firm, was born 
in France in 1520. | His early days were spent in poverty, 
and he was left by his father ir Paris at the early age of 
14, and thereafter supported himself, and picked up an 
education. He went to Caen in Normandy, and with a 
letter of introduction from his Latin master in Paris, 
cbtained employment in the works of Robert Macé, Printer 
and Bookbinder, with whom he spent five years. He fell in 
love with a girl in the household of his employer, called 
Jeanne Riviere, and married her in 1546. She was probably 
illiterate and had no wealth, but she proved of sterling 
character, and made him a true helpmeet. The young 
couple moved to Paris, where Plantin set up a small business 
in book-binding and leather work In 1549 they moved to 
Antwerp with their eldest daughter. At that time Antwerp 
was probably the most prosperous and wealthy city of the 
Continent, with a population of 125,000, and trading with 
every part of the world. There he continued his business of 


Christopher Plantin. at 


beokbinder with some success. He became favourably 
known to one very important man, namely the Seigneur 
Gabriel de Cayas, ‘secretary to King Phillip of Spain, who 
remained his friend throughout the years. 


Plantin met with an adventure, which nearly cost him 
his life, and incapacitated him from pursuing his calling as 
a bookbinder and leather worker. He was conveying to 
de Cayas, a leather worked casket, wherein de Cayas wished 
to place a jewel he was conveying to the Queen of Spun. As 
Piantin hurried along in the dusk he was set upor by some 
half drunken and masked roysterers, who mistook him for a 
musician, who had incurred their resentment, and he was 
run through the body with a sword, and left for dead. He 

ras, however, nursed back to health, and being unable to 
continue his former occupaticn, set up a printing establish- 
ment. This was in the year 1555. He worked hard, and 
as he had managed to pick up a good education he prospered, 
and devoted himself to publishing books of learning. The 
times were troublous, however, and the printer had many 
difficulties to face. The laws against the publication of 
books of a heretical character were severe. In 1561 Platin 
had to go to Paris on business, and was absent from 
Antwerp. One morning his family was alarmed to hear 
hammering at the door. It was the Margrave with an 
escort, and it appeared that he had a ccpy of a book cutitled 
‘ A Brief Instruction for Prayer,’’ which was stated to con- 
{ain doctrines contrary to the teaching of the Catholic 
Church. It bore no name of any printer, but the type was 
identified as being that in use in the Plantin Press. Ti turned 
out that the book had been printed by certain of the work- 
people, unknown to Plantin, at their own expense. ‘They 
were at once arrested and taken to prison. But worse was 
to follow, for later an order was received that Madame, the 
daughters, and the servant were to present themselves for 
examination before the dreaded Inquisition. They were all 
good Catholics, but by the intervention of some of *he 
Cathedral dignatories, the matter was settled. Neverthe- 
less, the news got abroad, and the creditors of the firm 
became alarmed, as the mere suspicion of heresy was 
sufficient to affect credit, and the whole of the printing plant 
and household effects were sold up at auction prices, and 
the family found themselves in dire straits. They set up 
a little business in underclothing to keep themselves alive 


12 A. H. Muir on 


until the return of Plantin. When he came hack he found 
his business had disappeared in his absence, but fortunately 
he had brought money back as a result of the settlement of 
certain affairs in Paris, and was able to buy back a little of 
his plant. Nevertheless, he was hard pushed for money, 
and often in difficulties. At last some of the Antwerp 
merchants, who had a high opinion of Plantin, found the 
necessary capital, and entered into partnership with him. 
From that time the business went ahead, and soon Plantin 
was able to buy them cut, and recover the owne rship of his 
business. 


Two of his employees were destiued to play a large part 
in the future of the undertaking. These were Francis 
Rapheleng and John Moretus. 


John Moretus was the first apprentice of Plantin, and 
when Plantin was sold out in 1562, he went to Venice for a 
time, but returned in 1565, and ever after was Plantin’s 
right hand man on the business side of the undertaking. In 
157 O he married Plantin’s second daughter Martine, and 
when Plantin died in 1589, he inherited the famous printing 
house, which was subsequently carried on by his descend- 
ants. 

Francis Rapheleng was a poor student, who had studied 
in Ghent. Paris and Cambridge. He had a good knowledge 
of the Semitic languages, and was Plantin’s stay on the 
literary side. He was nct a good business man, like 
Moretus, but his great knowledge nade him invaluable when 
Plantin published his great work, the Polyglotte Bible. He 
married Platin’s eldest daughter, Marguerite, in bo6os> bie 
inherited from Plantin the printing house which Plantin 
established in Leyden. 


Plantin was a man of high ideals, and set himself to 
use the art of printing for the spread of knowlec ge, and made 
it his endeavour that all his publications should be printed 
in the best style. He illustrated his books with plates, for 
the production of which he nad recourse to the best artists 
of his day. His great work was the Polyglotte Bible, which 
set out in parallel columns the text of the Bible in Greeis, 
Hebrew, Chaldean and Latin. The werk took four years to 
Ave ;omplish, and was supported by the King of Spain. ‘The 
best scholarship of the day was applied to make the book 
the best book of reference of its time. Rapheleng proved 


Christopher Plantin. 18 


most useful and untiring in his efforts for its perfection, 
while the King of Spain sent his chaplain, Doctor Arias 
Montanus, a man of great leariing, to assist in its pro- 
duction. ‘The cost of production, however, was very heavy, 
ond involved Plantin in sericus liabilities. 

Plant'n’s activity as a printer made itself felt far beyond 
the boundaries of the Netherlands. He had uninterrupted 
business relations not only with Dutch, Flemish and Brabant 
booksellers and printers, but with Englishmen, Scotchmen, 
Germans, Italians, Swiss, Poles, Portugese and Spaniards. 
He had branch establishments at Paris, Leyden, and Sala- 
manca in Spain, and was on the point of opening one in 
Tondon. He disposed of his Hebrew Bible in the North 
Western region of Africa, between the Mediterranean and the 
sahara. He sent books to America, and was one of the 
most regular «und influential visitors at the Fairs at Frank- 
fort. 

In 1570 King Phillip of Spain appointed him Protctypo- 
eraphe, an honour which brought him no wealth but much 
worry. He was given the privilege of printing the Liturgical 
books for Spain, a privilege which involved him in grave 
monetary difficulties, as the King was not at all prompt in 
settling accounts. Th's privilege, however, while a cause of 
much embarrassment to Plantin, proved a lttle gold mine 
to his heirs. 

Meanwhile Antwerp had declined in populaticn and 
wealth owing to the disturbances of the times. In 1576 
came the terrible ‘‘ Spanish Fury ’’ and the sack of Antwerp, 
iu which Plantin suffered both in wealth and in health. 
Antwerp took vears to recover from the harm inflicted on her. 

When Plantin died in 1589 he was buried in_ the 
Cathedral of Antwerp, and when his widow died in 1616 at 
the advanced age of 95 she was laid by his side. His tomb 

can be visited to this day in one of the chapels off the ambu- 
lntory, while in an adjacent chapel lie John Moretus, the 
erstwhile apprentice, and his wite Martine Plantin. 

Plantin had many cares and worries in his life, even 
when he was famous. Some arose from the disturbances of 
his time, others from his business, especially with reference 
to meeting his habilities, and others from certain members 
ot his family, and something of his philosophy of hfe may 
be gathered ‘from a sonnet written by him entitled * Le 
Bonheur de ce monde,’ 


A. H. Muir on | % 


¥ 


Avoir une maison commode, propre et belle, 
Un jardin tapissé, d’espahers odorans, 

Des fruits, d’excellent vin, peu de train, peu d’enfans 
Posseder seul sans bruit une femme fidéle. 


N’avoir dettes, amour, ni procés, ni querelle, 
N: de partage a faire avecque ses parens, 

Se contenter de peu, n’espérer rien des Grands, 
tégler tous ses desseins sur un juste modeéle. 


Vivre avecque franchise et sans ambition, 
S’adonner sans scrupule a la dévotion, 
Domter ses passions, les rendre obéissantes. 


Conserver l’esprit libre, et le jugement forti, 
Dire son Chapelet en cultivant ses entes, 
C’est attendre chez soi biea doucement la mort. 


“Belfast Natural History and Philosophical Society, Session 1924-25. 


AL 


G@LPIETATIS CONCORDIA. Ifasanl @ 
: 7 


FRONTISPIECE OF THE PLANTIN PotyGuor BIBLE. 


Illustration reduced from ‘‘ Christophe Plantin,’’ by M. Max Rooses 


Belfast Natural History and Philosophical Society, Session 1924-25. 


THE PLANTIN FAMILY. 


From the Triptych above the tomb in Antwerp Cathedral.’ 


Illustration reduced from ‘‘ Christophe Plantin,’’ by M. Max Rosses 


fast Natural History and Philosophical Society, Session 1924-25. 


‘THe OLtp Printinc Room. 


Illustration reduced from ‘ Christophe Plantin,’? by M. Max Rosses 


Spectroscopy and its Applications. 15 


27th January, 3rd and 10th February, 1925. 


In Physics Lecture Theatre, Queen’s University. 


Pror. W. B. Morton, President, in the Chair. 
SPECTROSCOPY AND ITS APPLICATIONS.” 
By R. C. Jounson, B.A., Ph.,D. 


[Summary of three popular lectures, illustrated by lantern 
slides and demonstrations. | 


Introduction. 

The physical conception of wave-motion, and the mathe- 
matical development of this idea have perhaps played a 
greater part than any other in correlating some of the most 
widely diverse phenomena of Nature. The aether of space, 
which has been postulated as the medium in which all 
electromagnetic waves are propagated, may or may not have 
a real existence according as one rejects or accepts the 
modern relativistic position; but of the nature and mathe- 
rnatical description of the wave-motion itself there can be 
no doubt. 


While all electromagnetic waves have one feature in 
ecmmon (the velocity of propagation “‘ in vacuo ’’), they 
may, of course, differ vastly in wave-length or frequency of 
vibration, and this determines the nature and properties of 
the waves. At the one extreme we have electrcimagnetic 
waves varying say from 10@ cms. to 10? cms. in length, which 
are the waves used in radio-transmission. ‘These merge into 
heat waves which may have wave-lengths from about 10-2 
ems. to 10-4 cms.; shorter than these we have the visible 
radiations lying between 7.10—® ems. and 4.10—® cms., 
which affect the eye and give rise to the sensations of colour: 
end again, shorter still, we have ultra-violet radiation incap- 
able of affecting the eye but capable of detection by the photo- 
graphic plate (and in other wavs). Ultra-violet rediation 
merges into soft X-radiaticn at about 10°-© cms. wave- 
length, while “‘hard’’ or penetrating X-rays may be as 
short as 10-8 or 10-$ cms. The highly penetrating radia- 


16 RR. C. Johnson on 


tion of cosmic origin of which we have heard recently has a 
wave length presumably Or the order of 10. ence. im 
spectroscopy we are concerned only with the analysis and 
measurement of the waves which constitute light: visible 
light within the range mentioned above, say 7. 10-5 ems. to 
4.10-5 ems., ultra- viciet light on the short- -wave side and 
intra-red light adjacent to the long-wave side. It will be 
necessary later to refer to wave-lengths again, and perhaps 
a word is desirable as to the units in whieh these are 
measured. We. call 10-3 cins. an Angstrom Unit, and on 
this scale the visible spectrum extends from about 7000 A.U. 
to'|4000 A.U. Fig I.* indicates roughly the wave-lengths 
corresponding to the colour sequence red, orange, yellow, 
green, blue, and violet of the visible spectrum. For 
measurements of the long waves in the infra-red and the 
shorter waves of the ultra-violet various methods are avail- 
able, and these will be described later. 


Spectroscopic Instruments. 

The basis of spectroscopy is the analvsis of light, and 
therefore any procedure by which a composite beam of light 
is dispersed into its components is available for the purpose. 

The historical method—and one of very great value still 
—is the use of a prism of glass or some other transparent 
substance. To prevent overlapping of the images in the 
spectrum produced, a fine slit is employed. This is at the 
focus of a lens (the collimating !ens) so that when the slit 
is illuminated by the source of light in question, a parallel 
beam is incident on the prism, is dispersed by it, and pro- 
duces a spectrum which is focussed by another Jens (the 
camera lens. Such a spectrum consists in reality of a 
rumber of images of the slit of the instrument, each one 
being in monochromatic light. 1f the instrument is intended 
for visual observations only, the spectroscope will be pro- 
vided with a cross-wire and eve-piece, but if for photographie 
records the instrument has a photographic plate instead of 
an eye-piece. This description of the essential features of a 
prism spectograph is illustrated in Fig. Il. 

In the case of work in the visible spectrum, the prism 
is usually made of dense flint glass of refractive index, say 
about 1.7 (puch) a sysvem will, however, transmit very 
little ultra-violet hght shorter than 3900 A.U. and ‘or work 
in this region a quartz prism and quartz jenses are generally 


*Plate and Figures follow Page 28. 


Spectroscopy and its Applications. 17 


used. In this way it is possible to photograph spectra down 
to 2100 A.U. The absorption of the film of gelatine on the 
photographic plate becomes very pronounced for wave- 
lengths shorter than this, and if it is desired to proceed 
further it is necessary to use Schumann plates in which the 
sensitive silver salt is deposited directly on the glass. Using 
these special plates one may pRopoer an) spectra down bo 
1800 A.U., but below this—in the extreme ultra-violet—the 
oxygen of the air absorbs rapidly. It is then necessary to 
use vacuum spectrographs (cr alternatively, spectrographs 
filed wth Helium), and the instruments in this case have 
necessarily to be of special design. With such instruments 
wave-lengths as short as 800 A.U. can be measured. 


At the other extreme we are faced with the insensitivity 
of the photographic plate tou red and infra-red light. An 
ordinary panchromatic plate will record wave-lengths up to 
about 7000 A.U., and by staining with suitable dyes (such as 
di-cyanine) it is possible to photograph wp to 9500 A.U. 
Bey ond this, however, the photographic plate is useless, and 
almost all infra-red work has therefore to be done with a 
thermopile and sensitive galvanometer. The thermopile 
receives an infra-red line on a small blackened strip, which 
is consequently heated slightly ; the heat is transformed into 

electricity, and the small resulting current is measured by 
the galvanometer. 


Glass is not of much use as material for a prism in 
infra-red work, and quartz absorbs strongly above 40,009 
A.U. Rock-salt and sylvine are therefore chiefly used for 
the purpose—the latter is transparent up to 180,000 A.U. 
Both substances suffer, however, from the disadvantage of 
being hvgroscopic, so that they are attacked by moisture in 
the ‘atmosphere. A remedy for this, which makes them 
reasonably permanent, is to paint the surfaces with a suit- 
able varnish. 


There are, of course, a great inany detailed considera- 
tions in connection with prism spectroscopy at which it is 
. Impossible here to do more than merely hint. The accuracy 
with which wave-lengths can be measured depends not 
merely upon the size of the instrument, but on the quality 
or definition of the spectral lines—and the latter is intimately 
bound up with the properties of the optical system of the 
instrument. -1t is necessary In some cases to use photo- 


18 R. C. Johnson on 


graphic plates of extra thin glass, so that these can be bent 
into a curved holder in order to yield the best possible 
definition, 


Perhaps a word may be inserted with regard to the time 
required in spectrum photography. ‘In the case of intense 
sources of ight (such as arcs) a fraction of a second may 
suffice, but in the majority of cases the time of exposure may 
be minutes, or even hours. The photography of compara- 
tively faint spectra under high dispersion is therefore a 
matter of some difficulty, and in order to reduce the time 
of exposure to a reasonable xmount the experimentalist may 
have to investigate with some thoroughness the conditions 
of production which will yield the spectrum in question with 
the greatest intrinsic brightness. 


In addition to prism instruments there is another class 
altogether, which are capable of giving high dispersion and 
resolving power: they are called gratings. Gratings may 
be either of the transmission or reflection type, though the 
latter are used in general in all important work. A reflection 


grating consists of a large number of parallel rulings on a 


plane or concave metallic mirror, usually either 14,000 or 
20,000 lines to the inch. Such gratings are made by a 
special engine under conditions of great rigour, the rulings 
being done by a diamond point. Concave gratings possess 
focussing power per se, but plane gratings are used in coin- 
bination with a suitable lens. <A grating constructed in this 
way has the property of ‘‘ reflecting ” a beam of light as a 
spectrum—it may be several feet in length. To be more 
precise, a grating—uutike a prism—produces several spectra, 
and in this respect has the relative disadvantage that as only 
cne spectrum can be utilised at a time, a considerable per- 
centage of the incident light is unavailable for photography. 
The mode of action of a grating is too complex to describe 
fully here, but it is based upon the property of light waves 
known as interference. Just as two trains of waves of any 
kind (e.g., waves on water) are capable of producing a 
stationary pattern of ripples such that at some points there 
will be reinforcement and at others annulment, so in the 
case of the light waves reflected from the rulings of the 
erating there will be certain directions of reinforcement, and 
in these directions spectra will result, 


Spectroscopy and its Applications. 19 


Types of Spectra. 


Emission spectra, which constituts the analysis of any 
source of light, fall into three classes :—continuous spectra, 
line spectra, and band spectra. All incandescent solids, 
with the exception of one or two rare earths, exhibit a con- 
tinuous spectrum only. An incandescent mantle, or a 
glowing electric light filament shows only this type of 
spectrum, and the distribution of energy in the spectrum 
depends almost entirely upon the temperature of the source. 
Most other sources of light yield spectra of bright lines, e.g., 
inetallic ares, high potential electric sparks, and the electric 
discharge of an induction coil through a gas are of this kind. 
Such spectra are called line spectra, in contrast to another 
type known as band spectra. These are usually produced 
under similar conditions, but are strikingly different in their 
appearance. As the name indicates, they usually have the 
appearance of bands or flutings, sharp cn one side, but de- 
graded away cn the other. Under very high dispersicn the 
band heads can be split up into fine lines, and the individual 
wave-leneths of these lines measured. 

Line and band spectra differ, however, not merely in 
their appearance, but in a more fundamental way. ‘They 
obey different mathematical laws of correlation, and they 
have different origins. Line spectra arise from atoms; band 
spectra arise from molecules. ‘To this generalisation there 
is no exception known. 

The plate indicates a few of these types of spectra. 
Numbers 1, 2, and 8 contain band spectra; Numbers 4 and 
5 are exclusively line spectra; Number 83 contains a certain 
amount of continuous spectrum in addition to bands. 


There is another very general class of spectra, viz., 
absorption spectra, which may also be of the line, band, or 
continuous type. Absorption spectra are the corverse of 
emission spectra; that is to say, a beam of light from a 
source which would yield a continuous spectrum may—when 
passed through the substance in question—have certain 
_wave-leneths absorbed. In this case the spectrum of the 
transmitted light will show dark lines or bands. 


Production of Spectra. 


All light is the result of atomic or sub-atomic processes. 
The modern views of atomic structure all indicate that the 


20) R. C. Johnson on 


origins of line spectra are to be found in the transitions of 
electrons within the atom from one orbit to another. During 
these Jumps energy is ernitted, and appears as monochro- 
matic radiation in the spectral lines. If the atoms of an 
element are subject to comparatively feeble excitation, then 
only one—the outermost clectron—is disturbed from its 
normal orbit; and in this case the “* arc ’’’ spectrum, as it 
is called, is partially or completely developed. If the ineans 
of excitation are more intense, the first electron 
may be completely removed and a second one disturbed. 
Such spectra, arising from the singly ionised atom, are 
described as “‘ spark ’’ spectra. It may be that the atom 
can be doubly ionised by vigorous excitation, and in this 
case a further line spectrum is obtained. Thus it happens 
that the same element may have several line spectra 
associated with it, which can be stimulated in turn by :n- 
creasng the intensity of the exciting conditions. Band 
spectra, which arise from molecules, are, as_a rule, found 
with the less energetic processes of excitation when the 
molecule is capable of existing as such. 


It is well known that many metallic salts, when. intro- 
duced into a bunsen flame, give characteristic colour te the 
flame. The spectrum of such a flame sometimes contains 
bands due to the salt molecule; but usually the light is that 
of the are spectrum of the metal, either completely er 
partially developed. Flame spectra represent, then, the 
least energetic type of excitation. The ionisatior in this 
case has purely a thermal origin; i.e., the violence of atomic 
collisions at the temperature of the flame is sufficient to pro- 
duce disturbance of the electrons inside the atoms. The 
bunsen flame itself has at least three interesting spectra. 
The luminous blue cone contains the “*‘ Swan ’’ bands, due 
prcbably to some hydrocarben molecule, and also the so- 
calied CH bands, of which the precise emitter is also un- 
known, From the non-luminous sheath there is strong 
ultra-violet radiation arising from the OH bands. Only a 
limited number of substances give flame effects. viz., vola- 
tile salts of sodium, potassium, strontium, barium, calcium, 
thallium, and a few others. It is, of course, necessary for 
the production of flame spectra that the salt be volatilised. 
This may be accomplished by introducing the salt on a 
p! latinum wire directly into the flame, but a better reethod 
is illustrated in Fig. IIT., where a spray of salt sclution is 


Spectroscopy and its Applications. 21 


introduced into the flame. Coal gas passes through the 
jet A, and burns at the top of the tube B. The flame can 
be made more or less luminous by rotating the jet A so as 
to have it more or less inclined to the vertical. The flask 
below contains dilute hydrochloric acid and magnesium turn- 
ings together with a trace of a soluble salt containing the 
metal of which the flame spectrum is required. The genera- 
tion of Hydrogen gives rise to a fine spray which is carried 
up the tube B by the draught of air, and colours the fiame. 
Suppose a trace of Strontium Chloride is the salt in question 
—the flame will vield bands due to Strontium Oxide and 
Strontium Chloride, together with lines due to Strontiuin. 
By feeding the flame with Chlorine, however, the spectrum 
can be reduced to a few band of Strontium Chloride. If it 
is necessary to avoid acids, we cun use a spark or are dis- 
charge between poles of the substance below the tube B and 
thus generate a fine dust which is carried by the draught 
of air into the flame. 

The presence of minute traces of Sulphur in the ordinary 
coal-gas flame can be detected by means of the blue zone 
which appears close up to the surface of a cold plate or tube 
which may be placed in the flame. This blue light is due to 
the band spectrum of Sulphur. 


Another general method of producing spectra is by burn. 
ing an arc between poles of the substance, or alternatively, 
between Carbon poles which are impregnated with the 
material. Currents of 2 to 15 amperes may be used accord: 
ing to the volatility of the substance. The spectrum of the 
Carbon are (excepting impurities) shows only one line 
of 2478 A.U. in the ultra-violet. The greater part of the light 
originates in the positive crater, and is continuous spectrum. 
The violet Cyanogen bands are also present in the Carbon 
are spectrum by reason of the presence of Nitrogen in the 
atmosphere. 

The are burned between Iron poles is of considerable 
use in spectroscopy as a “‘ standard ’’ spectrum. It is very 
prolific in lines,—to the number of several thousands—and 
a considerable proportion of these have been accurately 
measured and adopted as standard wave-lengths. 


The are between Mercury poles, enclosed in a suitably 
shaped tube, yields a brilliant green light consisting of the 


DD), R. C. Johnson on 


arc lines of Mercury. This light is used as a source of 
illumination in drawing offices, as it provides a pronounced 
black and white contrast. 


An arc—being essentially an electrical phenomenon— 
can be burned under a liquid, but in this case the spectrum 
lines are usually broadened considerably, and accompanied 
by the lines of Hydrogen if the arc is burned under water. 


Spark spectra proper are produced by use of an induction 
coil, which yields a small current at a high potential—say, 
10,000 to 20,000 volts—together with a condenser in parallel 
and a spark gap in series (vide fig. 1V.). The condensed 
spark between poles of the substance inquestion yields a 
spectrum consisting of both pole lines and air lines. No. 5 
spectrum of the plate is a photograph of the light from a 
condensed spark between Aluminium poles in an atmosphere 
of Oxygen. The Oxygen lines can be distinguished from the 
pole lines, in that they run uniformly across the spectrum, 
exhibiting no concentration in the neighbourhood of the 
poles. 


The nature of the electric spark has been the subject of 
a good deal of investigation. During each “ erack,’’ in 
which the condenser discharges across the spark gap, there 
really take place many thousands of oscillations of the 
electric current. By various experimental devices—such as 
the use of rapidly moving films—it has been found possible 
to measure the velocity and energy of the oscillations in the 
spark, and even to examine the spectrum of the light re- 
sulting from successive oscillations. A single discharge of 
the condenser yields a highly damped series of oscillations 
as a rule—a great part of the energy being in the “ pilot. 
spark,’’ or first member. ‘Lhis pilot spark of great energy 
gives only air lines, but it volatilises the metal at the same 
time. Subsequent oscillations generate the metallic line 
spectra, but it is clear that a considerable part of the energy 
of the spark is wasted in the production of air lines. The 
introduction of an inductance into the circuit lengthens out — 
the period of the oscillations, and at the same time threws 
more energy into the subsequent oscillations. By using 
large inductances the air lines can be removed, while the 
metallic lines remain. The velocities of the metallic vapours 
in the spark vary between 400 and 1,800 metres per second, 
higher velocities corresponding to the lower atomic weghts. 


Spectroscopy and its Applications. 25 


_ The preceding methods of exciting spectra are not easily 
adaptable to the case of gases. In this case the best method 
is to pass a high potential discharge from an induction coil 
through a glass tube fitted with two electrodes, and contain- 
ing the gas at a few millimetres pressure. The conditions of 
excitation are then under very convenient control, ¢.g., the 
tube can be easily immersed in liquid air or raised to a high 
temperature in observing the modifications of spectra. An 
ordinary induction coil discharge through a tube is cor- 
parable as regards energy conditions to are spectra; while if 
a condenser is put across the terminals (as in fig. IV.) and 
the tube put in series with the spark gap, the light from the 
tube yields “‘ spark ’’ lines of the enclosed gas. 

It is impossible here to go into detail about the manu- 
facture and filling of discharge tubes: this is ali a regular 
part of the work of the spectroscopist. Likewise one van 
only hint at the tremendous extent of the field of modern 
spectroscopic research. It must be remembered that every 
element has its own line spectra—which are capabie of ex- 
citation under suitable conditioris—and when it is recalled 
how many molecules (oxides, nitrides, hydrides, halides, 
etc.) may possibly be expected to yield band spectra, tne 
search for these and the accurate measurement of their wave- 
lengths throughout the region from infra-red to ultra-violet 
is itself a gigantic task. Many of these exhibit structural 
peculiarities. Some are modified by magnetic fields (the 
Zeeman effect), some by strong electric fields (she Stark 
effect), and some are profoundly modified when cther 
radiating gases or vapours are present at the same time. 
The whole question of the intensities of spectral lines and 
bands opens up another large field of work, particularly as 
various physical conditions are capable of modify:ng the dis- 
tribution of energy in spectra. 

The Applications of Spectroscopy. 

The data of spectroscopy are of very considerable vaiue 
‘in several distinct branches of Natural Science. For the 
chemist and metallurgist there is here a new analytical 
weapon of far greater sensitivity than eny chemical reaction 
could provide. A spectroscope could detect the presence of 
one millionth part of the least quantity of sodium which the 
chemist might detect by chemical means. 5So in a metallic 
alloy the presence of minute quantities of impurity are ex- 


24 RoC. Johnson wr 


hibited by corresponding lines in the spectrum. Jo the 
physicist the analysis and interpretation of spectra provide 
a clue to atomic and molecular structures. It is not too 
much to say that when the nature and genesis of spectra are 
fully understood we shall have solved the most fundamental 
problems of physics. On the mathematical side Bohr, 
Sommerfeld, Heurlinger, Kratzer, and cthers have in recent 
years developed theories of the genesis of spectra from the 
atom and the molecule. On the experimental side the last 
quarter of a century has yielded a tremendous amount of 
information with regard to actual spectra. Before the 
latter results can be interpreted, however, the frequencies 
corresponding to the various lines in the spectrum have to be 
related together in formulae of certain types, and then a 
theoretical interpretation of the various coefficients is 
possible. 


If, however, the stuly of spectra has yielded information 
of fundamental importance to the physicist, it has quite 
revolutionised astronomy: se much so that the last 25 years 
have witnessed the birth of a new science, “Astrophysies. ” 
By an analysis of the light coming from distant ¢ stars and 
nebulae, from the sun and the planets, it has made pcssible 
not only a celestial chemistry but a celestial physics, in pro- 
viding us with knowledge cf the behaviour of matter at 
temperatures and pressures differing vastly from any that 
occur on the earth. But by a study in the laboratory of the 
variations in spectra under various physical conditicns we 
have an index to the extreme conditions prevaii in celestial 
bodies. In connection with the solar spectrum, for example, 
there are some 16,000 lines, two thousand of which belong 
to Iron. Altogether some 66 terrestrial elements have been 
detected in the solar spectrum. The conditions are appar- 
ently such as to make possible the existence of compounds 
like Cyanogen, Magnesium hydride, Calcium hydride, and 
some hydrocarbons, for all these give bands in the solar 
spectrum. The spectroscopic study of sun-spots has re- 
vealed the true nature of these as vortices in which matter 
is in rapid circulation, and it has been found that there are 
strong magnetic fields connected with them (as shown by the 
magnetic effect on the spectral lines). We also know through 
the spectroscope that the sun rotates not as a rigid body, 
but more rapidly at the equator than at the poles. 


e 


Spectroscopy and its Applications. oe 


We 


Planetary spectra again provide an interesting sequence, 
and these Sontitm the views as to planetary temperatures 
which had been formed on quite other grounds. 


The spectra of comets have been subject to much in- 
vestigation. The only elements existing without doubt in 
comets are Hydrogen, Oxygen, Nitrogen, and Carbon. The 
spectra of comet tails differ somewhat from those of comet 
heads. In the latter the Cyanogen bands are strong and thie 
Swan bands appear (probably due to CH), but in the tails 
of many comets a new set of bands is found. These are 
due to an ionised CO molecule, and their origin was first 
identified by Fowler. Spectrum 2 of the plate shows this 
system of bands as photographed by the author from a tube 
containing Helium under special conditions. 


The Doppler Effect. 


One well-known physical phenomenon perhaps calls for 
special mention here. If a source of radiation (i.e., of waves) 
is moving towards or away from the observer, or if the 
observer is moving, or if both are moving, then the apparent 
wave-length as recorded by the observer is altered. We 
are familiar with the fact that the whistle of a railway engine 
approaching a station appears to rise in pitch to an observer 
on the platform, and to fall again as the engine recedes. 
Here the engine whistle is a source of sound waves moving 
relative to the observer. ‘The same phenomenon is found in 
the case of light waves. 

If a star is moving towards or away from the earth in 
the line of sight, then by no possible mechanical contrivance 
could a terrestrial observer recognise the fact. The spectro. 
scope, however, reveals this motion, for since the star is in 
motion relative to the observer the effective wave-lengths of 
the lines emitted will be altered, and by measuring the dis- 
placement of the spectral lines of the star it is possible to 
calculate from a simple formula the actual velocity of the 
star in the line of sight. / 


By use of the spectroscope and application of this 
principle it has been possible to recognise binary stars which 
are so far distant that the most powerful telescope is unable 
to resolve them. In such binary systems the two stars are 
usually rotating about their common centre of gravity, so 
that in general one will be approaching the earth while the 


26 BR. C. Johnson on 


other is receding; while a quarter period ater there will be 
no motion of either in the direction of the earth. The 
spectral lines from a such a star will indicate this by period- 
ically doubling and undoubling in half the period of the stars’ 
rotation. From such information it is sometimes possible to 
compute approximately the masses of the stars. A special 
case of the above phenomenon arises if one star has cooled 
more rapidly and become a “‘ dark.’’ star, while the other 
continues to give off light. In the case of a very distant star 
this could only be recognised by the telescope if the plane of 
rotation was in the line of sight, in which case the dark star 
would periodically eclipse the other. The spectroscope, how- 
ever, indicates that the star is in motion by an oscillation of 
the spectral lines abcut a mean position. 


Stellar Spectra and Cosmic Evolution. 


Modern cosmogony explains the formation of stars as 
the disintegration products of spiral nebulae. Briefly stated 
the evolutionary chain is as fellows:—Nebulous matter 
originally existed highly attenuated, cold, and widely diffused 
through space. The universal force of gravitation in course 
of time induced contraction, during the course of which two 
things must necessarily occur :— 


(1) The law of conservation of angular momentum 
would involve an increasng angular velocity of rota- 
tion as condensation of the nebula continued. 

(2) The gravitational energy lost by contraction would 
re-appear as heat, and the temperature of the 
nebulous matter would rise. 


With increasing velocity of rotation the nebula wouid 
assume a spheroidal, and ultimately a lens-shaped configura- 
tion; but beyond a certain critical point mathematics shows 
that no further compensation would be possible, and matter 
would be flung off from the periphery. In the presence oi a 
gravitational field, however small, the ejection of matter 
would be localised to two diametricaily opposite points of she 
periphery, and so would be emitted in long spiral arms from 
the rotating nebula. Such longitudinal filaments, being 
unstable, break down into small condensations which yield 
stars. All stages in this evolutionary chain can be observed 
by the astronomer. Many hundreds of spiral nebulac have 
been recognised in space, all at vast distances from even the 


ini 


Spectroscopy and its Applications. 27 


farthest stars of our own universe. Some of thern are ex- 
ceedingly massive, e.g., the great nebula in Andromeda is 
eapable of yielding a hundred million stars of ahout the 
average mass of our sun. The final disintegration of a spiral 
nebula produces a star cluster (such es that in Hercules), 
and on this interpretation our own galactic universe would 
be a star cluster—indeed, the largest star cluster known. 


We, however, are interested particularly in the stars 
themselves and their evolution subsequent to formation. 
Altogether about a quarter of a million stars have had their 
spectra examined, and these have been classified accordiny 
to their general types into a number of groups denoted by the 
letters O, B, A, F, G, K, M,N, R. These groups have been 
again subdivided, but this general division is adequate for 
cur present discussion. The O type are the hottest stars, 
are often found associated with irregular nebulae, and 
usually have a spectrum consisting of bright lines due to 
Helium and Hydrogen. The B type are predominantly 
“Helium Stars,’’ but the first metallic lines appear (viz., 
Calcium lines). The A type have very strong Hydrogen 
lines, the Helium has gone, while metallic lines due te 
icnised Calcium, Magnesiurn, etc., invrease in intensity. 
In the F type the Hydrogen lines decrease, and the metallic 
lines increase. Class G consists of the solar type of star 
(i.e., our sun is typical). hey contain many metallic 
lines, Hydrogen lines, etc., and show the first evidence of 


chemical compounds. Absorption of the blue end of the 
spectrum makes these stars appear vellow. The K type 
have feebler Hydrogen lines and mauy band spectra. M 


and N types exhibit broad absorption bands, usually strong 
in the ultra-violet, and also bands of Titanium: Dioxide. 
‘hese types are “‘ red ’’ stars.. A rough estimate of the 
temperatures corresponding to the different classes would 
be :—O— 35,000° C; B— 26,000 to 14,000° C; A—-. 12,000 
te 9,000° C; F— 7,500° C; G— 6,000 tc 5,000° C; M-- 
3,000° C. It is impossible here to enter into an adequate 
discussion of the bearing of spectroscopic evidence on the 
course of evolution of a star. It can only be said in passing 
that. the evolutionary process is by no means as simple as 
might be imagined at first sight. Contrary to what was 
thought at one time a star does not pass through the stages 
OB, A, F,.G, K, M.-N) -R:in:the order named.: but. be- 
ginning as a star of comparatively late type—say IF, G, or 


28 Rk. C. Johnson on 


K—and of very low density, its subsequent contraction 
results in a rise of temperature. This means a regression 
of type through K, G, F, A. ete. Finally a time comes 
when the loss of heat by radiation will preponderate, the 
temperature will decrease, and a progression along the 
evolutionary chain will result. 'The star ultimately attains 
a comparatively small bulk and large density (.5 te .05). 
This theory of stellar evolution—known as ‘‘ the giant and 
dwarf theory ’’ we owe to Lane, Ritter, and Russell; and 
it appears to be well substantiated by astronomical data. 

Perhaps enough has been said to show that spectro- 
sccpy is playing, and will play, a fundamental part in ovr 
knowledge not only of the fine structure of matter, but of 
the nature of the material Universe itself. 


Physics Dept., 
Queen’s University, 
Belfast. 
January, 1926. 


Description of Plate. 


1. The Negative band spectrum of Carbon. This is in 
the ultra-volet between 3,000 and 4,000 A.U. ap- 
proximately. The spectrum originates from an 
ionised CO molecule. 

2. The Comet-Tail bands, which also arise from an 
ionised CO molecule, and extend irom the orange 
at 6,250 A.U. down to 3,200 A.U. 


3. <A band spectrum of Suiphur Dioxide. 


4. Condensed discharge through a stream of Sulphur 
Dioxide in a vacuum tube. Shows the line spectra 


of Sulphur. 
5. Condensed spark belucen Aluminium poles in 
about 80 millimetres pressure of Oxygen. Note 


that the Aluminium lines are strongest at the poles. 


Pelfast Natural History and Philosophical Society, Session 1924-25. 


= Capp 


29 


20th January, 1925. 


ee eee 


In Assembiy Minor. Hall. 


Proressor W. B. Morton, President, in the Chair. 


Mr. Percy ALLEN. 
‘OUR DRAMA FROM MRS. SIDDONS TO HENRY 
IRVING (1800-1885)”’ 


[No®Abstract]. 


24th February, 1925. 


In Assembly Minor Hall. 


Pror. Morton in the Chair. 


Mr. Joun J. Warp, F.E.S. 
“LIFE: ITS MYSTERIES AND ODDITIES.”’ 


Illustrated by Lantern Slides. 


[No Abstract. | 


30 Annual Meeting. 


ANNUAL MEETING. 


104th SESSION, 1924-25. 


The Annual Meeting of the Shareholders and Members 
was held on the 21st October, 1925, in the Museum, College 
Square North. Professor W. B. Morton, M.A., M.H.1.A., 
President of the Society, occupied the chair and amongst 
those present were Professor Gregg Wilson, M.A, D.Se., 
Colonel Berry, ‘MOR TA.3) Dr I) Al Chart Nine G, 
Pomeroy, M.A.; Mr. F. Adens Heron, D.L.; Mr. J. M. 
Finnegan, B.A., B.Se.; Mr. El. ©. Lawlor, M.A. MURA: - 
Mr. E. J. Elliott, Mr. T. Edens Osborne, F.R.S.A.1.;: Mr. 
David E. Lowry, Mr. Wm. Nichol! and Arthur Deane, Hon. 
secretary. 


Apologies for absence were received from Sir Charles 
Brett, LL.D.; Sir Frederick Mcneypenny, C.V.O.; the Rt. 
Hon. Samuel Cunningham, Mr. R. M. Young, M.A.; Dr. 
S. W. Allworthy, Mr. Robert A. Mitchell, LL.B.; Major 
Blakiston-Houston, and Mr. W. B. Burrowes, Hen. 
Treasurer. 


The Hon. Secretary read the notice convening the 
meeting, and also the Annual Report of the Council, which 
was as follows :— 


Your Council has the pleasing duty of placing before the 
Shareholders and Members the report of the work of the 
Society for the closing year. 


ne 


OBITUARIES. 


Your Council regrets the decease during the year of 
four members, Mr. A. W. Stewart on the 8th December, 
1924; Mr. J. B. O’Neill on the 16th March, 1925; Mr. 
James R. Bristow on the 4th April, 1925, and Dr. Gawin 
Orr on the 18th May, 1925, 


Annual Meeting. 3] 


NEW MEMBERS. 

Twenty-one candidates have been elected te n:ember- 
ship, making a total of 322 Shareholders and Members. 
Three Shares (No. 426) registered in the name of the late 
John Anderson, F.G.S., for inany years Hon. Treasurer of 
the Society (1871-1882) have been transferred to Mr. Har- 
court Howard Jones. 


ee 


LECTURES. 

The Session was opened on the 4th November, 1924, 
with an illustrated address by the President, Professor W. 
B. Morton, M.A., M.R.I.A., on Lord Kelvin. Altogether 
seven lectures were delivered, two in the Museum, two in 
the Assembly Minor Hall and three at the Queen’s 
University. The Council desires to make special reference 
to a course of three lectures by Dr. R. C. Johnson, Lecturer 
on Physics at Queen’s University, on ‘‘ Spectrosccpy and 
its Applications,’’ which were well attended by members 
and the public, and were much appreciated. 


COUNCIL’S THANKS. 

Your Council is again indebted to the Vice-Chancellor 
of Queen’s University (Dr. Livingstone, M.A., M.R.I.A.) 
for the use of rooms; the Physics Lecture Theatre being 
used on the 27th January and 8rd and 10th February. The 
Council desires to record the Society’s thanks to the Uni- 
versity authorities for their continued co-operation in the 
Society’s work and toc the lecturers for the assistance 
rendered by them. ‘They wish also to thank the Press for 
the interest they have taken in the Society’s proceedings 
during the session. 


PUBLICATIONS. 

During the pericd covered by this report two publica- 
tions have been issued by the Society :—‘‘ The Monastery 
of St. Mochaoi of Nendrum,’”’ by Mr. H. C. Lawlor, M.A,, 
M.R.LA,, Hon. Secretary of the Archeological Section, 
and ‘‘ A Guide to the Ruins of Nendrum Monastery,” by 
Major Blakiston-Houston, J.P. Both publications have 
met with great success. 


Annual Meeting. 


o 
bo 


ARCHAEOLOGICAL SECTION. 


The Archeological Section continues its progressive 
work. <A separate report of the Archeological Committee 
will be submitted to the members of the section at its 
Annual. Meeting. Your Council has approved under date, 
6th February, 1925, revised by-laws governing the Section. 
These have been printed, and copies may be obtained 
from the Hon. Secretary of the Section. 3 


EXCHANGE. 


Your Council continues to receive, in exchange for the 
Society’s Proceedings, publications from some sixty 
Societies and Institutions in all parts of the world. Many 
ot these publications are of much value and inportance. 


DEPUTATION TO QUEEN’S UNIVERSITY. 

A proposal was made at the last Annual Meeting and 
referred to the Council for consideration, that a deputation 
from the Society should wait upon the Senate of Queen’s 
University with a view to establishing a Chair of Arche- 
clogy and Classical Art. The deputation has been sym- 
pathetically received by the Senate of the University, and 
your Council hopes that the University at the earliest 
opportunity will follow the example of many of the more 
modern Universities in England and Scotland by establish- 
ing either a chair or a lectureship in Archeology. 


BUILDING. 


Your Council was compelled, owing to the cordition of 
the outer walls of the Museum staircase, to have them re- 
pointed, many slates replaced, and new gutters fixed to 
staircase roof; Messrs. Young and Mackenzie kindly under- 
took to see that the work was satisfactorily completed. The 
fabric of the building, including the house attached, is now 
in satisfactory condition, and the thanks of the Council 
have been tendered to Messrs. Young and Mackenzie for 
their services. | 


COUNCIL MEMBERS. 


In accordance with the constitution of the Scciety five 
Members of the Council retire from office, viz., Sir Charles 


Annual Meeting. Do 


Brett, Dr. 5. W. Aliworthy, Messrs. T. Edens Osborne, 
Wm. Fareu, and A. Deane. All these members are eligible 
for re-election. 


FINANCIAL STATEMENT. 


The Financial Statement, which has been passed by 
the Auditor of the Local Government Department of the 
Ministry of Home Affairs, appears on page 41. 


In submitting his statement for the year ending 31st 
October, 1925, the Hon. Treasurer (Mr. W. B. Burrowes) 
reported that the credit balance at the beginning of the year 
was £95 9s 9d. This had been changed to a deficit of 
£119 12s 9d, partly accounted for by some exceptional 
expenditure which had to be met such as repairs to the 
building, £70 Os Od, and a balance on the Centenary Volume 
of £120 Os Od. These items, however, will not arise again, 
as the Hon. Treasurer does not anticipate any large amount 
to be met during the coming season. 


ADOPTION OF REPORT. 


In moving the adoption of the Report the President said 
all the members of the Society were greatly indebted to Mr. 
Deane for the work he had done for the Society since he 
became Hon. Secretary. His efficiency, interest, and zeal 
had certainly made his (the president’s) work very easy. 
The Report was of a very satisfactory nature, and showed 
that the Society had initiative, and was carrying on its work 
in an efficient manner. Whilst encouraging their own 
members to give papers, they at the same time felt it a 
duty to bring in distinguished lecturers from outside in order 
to spread scientific knowledge among the people. It: carry- 
ing out that policy they had not had to refuse any paper 
from any of their own members; they had not sacrificed one 
side to the other, and they had had excellent papers from 
their members as well as lectures by prominent men from 
outside their own ranks. Thus interest in the work of the 
Society had been kept alive. It was, he continued, a good 
thing to have a course of lectures carried on at the Uni- 
versity, as it made them feel the close connection which 
existed and ought always to exist between the Society and 
the University. They looked forward in the next session 


34 Annual Meeting 


to having similar meetings at Queen’s. In conclusion the 
President referred to the important work done by Mr. H. 
C. Lawlor and his colleagues in connection with the work 
of the Archeological Section at Nendrum, and said he had 
heard the highest opinions expressed regarding Mr. Lawlor’s 
book and the work which it embodied. 

Colonel R. G. Berry, M.R.I.A., seconded, and the 
report was unanimously adopted. 


ELECTION TO COUNCIL. 

On the motion of Mr. David E. Lowry, seconded by 
Mr. A. G. Pomeroy, M.A., the following five members of 
Council retiring in rotation were re-elected fer three 
years:—Sir Charles Brett, Dr. S. W. Allworthy, Messrs. 
T. Edens Osborne, William Faren and Arthur Deane. 


THANKS TO PRESIDENT. 


Proposed by Mr. H. C. Lawlor, M.A., 
Seconded by Mr. E. J. Elliott, and unanimously 


Resolved—‘‘ That we place on record, at this Annual 
Meeting, our deep appreciation of the services rendered by 
Professor W. B. Morton, M.A., M.R.I.A., during his second 
year of office as President of the Society.’’ 


At the conclusion of the Annual Meeting the new 
Council met to elect officers for the ensuing year, when 
Professor Morton was unanimously elected President. 


The Officers and Council of a for 1925-26 
will be found on page 46. 


Ss 
Cre 


Archeological Section. 3 


ARCHASOLOGICAL SECTION. 


9th SESSION, 1924-25. 

The 9th Annuai General Meeting of the Archeological 
Section was held in the Museum, College Square North, on 
Wednesday, 2nd December, 1925. In the absence of the 
Chairman, Sir Charles Brett, LL.D., the chair was occupied 
by Mr. Godfrey W. Ferguson, J.P. 

_ The Hon. Secretary of the Section (Mr. H. C. Lawlor, 
M.A., M.R.1.A.) presented the Committee’s Report for the 
year ending 3ist October, 1925, as follows:— 

The Committee regret that by death or resignations the 
Section had lost twelve members during the vear, while 
eight new members had joined, the total membership now 
standing at 118. 

The Comuinittee held four meetings during the year, 
which were well attended; at its first meeting Mr. Andrew 
Robinson, M.V.O., M.B.E., was co-opted a member. 


As forecasted in last year’s Report, the Comittee 
undertock the investigation and repair of the cashel and 
souterrain at Dromena, under the supervision of Colonel 
Berry. Considerable difficulty was experienced in procuring 
labour, as men can only be obtained when they can spare 
time from their farms. Hence the work at Dromena has 
made slow progress; Colonel Berry will defer his report upon 
the investigation until it is completed, which he hopes will 
be next spring or summer. 

A former resident in the district of Newtowrards re- 
ported to the Hen. Secretary that on Chapel Island in 
Strangford Lough, he had once seen a number of cairns of 
stones which he believed were prehistoric burial roounds. 
Chapel Island is very difficult of access, but Lord Lendon- 
derry, on hearing of the matter, placed his motor launch 
at the Hon. Secretary’s disposal, which enabled him to 
inspect the cairns. There were five in number. and had all 
the appearance of burial cairns. Major C. Blakiston 
Houston offered, if we engaged James Lowry and 
his men, who had worked at Nendrum, to convey 
them across to the Island in the morning and back 
in the evening, on whatever day suited Lord Lendon- 
derry’s convenience to lend the boat from Mountstewart. 


(2) 


36 Archeological Section. 


The date arranged was the 38rd September. ‘The men on 
arrival proceeded to examine the cairns by removing the 
stones at the centre, down to the undisturbed till. It was 
found that at the bottom there remained the foundations 
of the walls of dry-stone buildings, some six feet square, 
open on the south side; modern nails were found on the 
flcor. The cairns were certainly not of prehistoric age, and 
from enquiries made by General Montgomery, the owner of 
the Island, it appears that the island at one period, perhaps 
a hundred years ago, had been a great centre of the kelp 
burning industry; the heaps of stones were evidentiy the 
ruins of the kelp burner’s shelters which were built open to 
the south to protect them from the bitter north wind that 
sweeps over this exposed part of the Island. 


The afternoon was spent in examining the ruin of the 
tiny chapel on the eastern summit of the island. A mere 
fragment of the foundation of the early chapel remains; 
this was carefully exposed by removing the debris of a 
modern mortared erection used apparently as a cattle shelter 
at one time, and a kelp burner’s house at another, as in the 
debris was found a kelp sickle. On the debris being cleared 
it was found that the early chapel had been of clay cemented 
stones, dating probably contemporanecus with the school at 
Nendrum, say 9th or 10th century. The chapel measures 
(inside) E. to W. 28ft. 10in., N. to §. 14ft. 4in. Walls 33in. 


thick. The door was on the north side, 7ft. 2in. from the: 


west gable. On each side of the doorstep, which is very 
much worn, is a fragment of a jamb, very roughly cut to 
receive a door. In the N.W. corner were the foundations 
of a little room, some 8f{t. x 6ft. inside, evidently a priest’s 
kitchen. The doorway between the jumbs is 2ft. 6in. wide, 
but only about 6in. of the jambs remain on either side. 


Almost on the surface of the floor were what appeared 
to be the much decayed bones of a heifer or similar animal, 
as if it had been thrown in there without a grave, and the 
ruined remains of the modern building thrown over it to 
bury it. On digging, the only antiquarian remains found 


were a few fragments of pottery of the old or souterrain © 


type, and one fragment of a wheel turned vessel. The 
fragments were too small to reconstruct the vessels, but 
the former may be as early as the 7th century, the latter 
as late as the 10th or 11th, 


Archeological Section. 37 


To the E. of the chapel, in the hollow, perhaps 30 feet 
below the level of the hilltop, are a number of irregularly 
placed stones in what appears once to have been a walled 
enclosure. This is evidently the church yard attached to 
the old chapel. 

Of the history of this ancient ecclesiastical site, 
apparently nothing is preserved. Dr. Reeves visited it in 
1844. At that date probably what now have the appearance 
of burial cairns had some shape indicating their actual use, 
kelp burner’s shelters, as he does not refer to them. Had they 
been as they now appear, he could not have failed to enquire 
into the possibility of their being prehistoric cairns. 


The Committee wish to record their special thanks to 
Major Blakiston Houston for his keen interest in this in- 
vestigation, and for the use of his motor launch in bringing 
Mr. Lowry and his men across the lough and back again, 
and generally superintending the work. Jspecial thanks 
are also due to Lord and Lady Londonderry for the use of 
their launch and boat. Lady Londonderry came and took 
the keenest interest im the matter, and the Marquis in- 
tended to be present; he had a sudden call on Parliamentary 
duty, and at the last moment cculd not come. The 
Committee also wish to thank General Montgomery of Grey- 
abbey, the proprietor of the island, for so willingly according 
consent to the investigation. He caine with his brother Mr. 
George Montgomery and both took a lively interest in the 
proceedings. It is quite possible, and even very probable, 
that Chapel Island, with its 10th century, or earlier, chapel, 
was an outlying daughter of Nendrum. Local tradition 

supports this idea. 

Thus the actual investigation work of the Archaclogical 
Section, compared with previous years, has not a great deal 
to show. But its influence has been felt. In last year’s 
Report reference was made to a deputation from all the in- 
terested Societies which waited upon the Government to 
urge upon it the necessity of an Act of Parliament for the 
Preservation and Protection of Ancient Monuments. The 
members of the deputation, while representing the Royal 
Irish Academy, The Royal Socicty of Antiquaries of Ireland, 
The Belfast Naturalists’ Field Club and this Society. were 
all members of the Archwological Section of this Society. 


38 Archeological Section. 


As a result of the representations made to the Govern- 
ment, a Bill dealing with the subject was promised in the 
King’s Speech at the opening of the present Parliament. 
'This Bill is being influentially supported, and may have been 
entered as an Act of Parhament before this Report is pre- 
sented to the Section. It is satisfactory to have to record 
that if so entered, it will have been entirely to the credit 
of the Archwological Section of this Society. 


The Hon. Sec. being in Augher, Co. Tyrone, in Septem- 
ber, made enquiries regarding that very important monu- 
ment of antiquity, the chambered tumulus of Knockmany, 
containing several engraved stones of importance quite equal 
to those at New Grange. He was informed that as nobody 
seemed to know anything about it as being important, the 
stones had been shifted, and that it might suffer injury at 
he hands of the men working on the Government Forestry 
Department. On his return, the Hon. Secretary reported 
to Dr. Chart the danger tc which he had heard that the 
monument was exposed; Dr. Chart esked for a detailed 
report, which he could lay before the Ministry of Agriculture, 
to whose Department the site belongs. The Hon. Secretary 
visited the monument early in October and found the stones 
much injured by hooligans cutting their initials or names 
over the precious spirals, cup marks, and other designs, 
which, in addition, were rendered almost invisible through 
the growth of lichen. Several of the stones were 
either prone or in danger of becoming so. Dr Chart 
forwarded this report to the Forestry Department, and we 
are assured that the Monument will be carefully surrcunded 
by a barbed wire enclosure, to which no one will be 
admitted without a yermit, and that the recently displaced 
stones will be re-set up and the lichen cleaned off. If this 
were done, possibly more clear transcriptions of the inscrip- 
tions might be made or others found. 


With regard to Nendrum, Mr. Johnston reported that 
during the past summer a very large number of people had 
visited the ruins, and the ‘* Guide to the Ruins,”’ by Major 
Houston had had a ready sale. Of 600 copies, only 50 now 
remain, in the hands of various booksellers, etc. These 
would certainly be sold early in the coming year, and a 
second edition would be necessary. Out of the funds in the 
collecting box at Nendrum, sign posts directing visitors 


Archeolcgical Section. hy, 


where to go, were purchased, and Mr. Lowry and his men 
had been paid for two days’ work, cutting down the weeds 
and brambles. These items of receipt and expenditure 
appear in the Hon. Treasurer’s account. 

With regard to the Nendrum Pook; this was issued on 
the 17th March, 1925. 600 copies were printed, of which 
400 were bound. Of ihese some 80 copies were issued to 
the Press for review; ten copies were, under customery use, 
taken by the Author, and 320 copies actually sold; some 
fcrty copies remain in the hands of the printers and booix- 
sellers. The average price realised by sales was about 7/11 
per copy. The accounts, in which the book venture is in- 
cluded in the “* Nendrum Fund,’’ show that after all charges 
for circulars, printing, advertisements, etc., have bcen paid, 
there is a credit balance of some £7. Sales of the Book 
continue at, of course, a reducing rate, but when the re- 
maining bound copies are disposed cf, there should be a 
surplus of at least £20/25 to the credit of The Nendrum 
Iund. To this must be added the sale of the still unbound 
copies, 200 in number, which may have to be sold as a 
Publisher’s Remainder, at perhaps a net sum, after cost of 
binding, of say 2/6 each, which represents a liquid asset of 
about a further £20. 

The Press Reviews of the book have been eminently 
laudatory. Of these special mention must be made of those 
in The Times, The Review of Reviews, The Irish Rosary, — 
The Antiquaries Journal, London, The Spectator, The 
Journal of the Cork Historical and Archeological Soriety. 
The Scottish Historical Review, The Journal of the Royal 
Society of Antiquaries (Ireland), The Irish Statesman, The 
Glasgow Herald, the Scotsman. the Journal of the Co. 
Louth Archeological Society, The Dublin Magazme, The 
Belast News-Letter, Northern Whig, Irish News, The Bet- 
fast Telegraph,. The Ivish Times, The Daily Independent, 
The Irish Book-Lover, and in the Welsh Y Tyst. Further 
reviews, chiefly in Continental papers, are promised. <A 
statement of the sale of this volume will be found on page 
42. 

In the unavoidable absence of the Hon. Treasurer, the 
Financial Statement was alsc read by the Hon. Secretary. 
It showed a balance to credit of the Section of £111 12s 9d, 
including £6 8s 9d to the credit of the Nendrum Fund after 
all expenses in connection with the Nendrum Book had been 
paid. 


40 Archeological Section. 


After some amendments, on the suggestion of the Very 
Rev. the Dean of Down, the report was adopted and ordered 
to be sent forward to the Parent Society for printing in the 
Society’s Proceedings. 


ELECTION OF OFFICERS AND COMMITTEE. 


Sir Charles Brett was unanimously re-elected Chair- 
man, and Mr. H. C. Lawlor, Hon. Secretary of the Section. 
The Committee, of which the Section elect under Riile IIT. 
nine members, was re-elected, it beiug understood that at its 
first meeting, it should co-opt Mr. Andrew Robinson and Mr. 
David EK. Lowry. The Committee thus, including the co- 
opted members, will consist of: —Sir Charles Brett, LL.D., 
Chairman; Mr. W. B. Burrowes, Hon. Treasurer: Mr. H. 
C. Lawlor, M.A., M.R.1.A., Hon. Secretary; Messrs. F. A. 
Heron, D.L.; R. 8, Lepper, M.A., F.R.Hist.S.; T. Edens 
Osborne, F.R.8.A.J.; J. Theodore Greeves, R. J. Welch, 
M Se. MR A:; G. W: Fereuson) J-Ps-Colomeloan 
Berry, J.P., M.R.1.A.; Professor W. B. Morton, M.A. 
(President), Andrew Robinson, M.V.O., M.B.E.; David E. 
Lowry, Arthur Deane, M.R.I.A.. Hon. Secretary of the 
Society. 


‘926T “THdy. Jo Aep 496 | ‘9261 ‘Arenigeg yo Avp 41g 
‘IoypnY “AMUVIO ‘A ‘JaOWYO Suunooy “SHMOMANA A “M 
*4D9IIOD SI BUIOZeL0F oy} yeyy AjizIEd J ‘10UIeEAOy ‘TL LOITIA ‘L A 
‘JUNODOB ONIZ V ST 9AOGR ay} YYZ AJIZIID OAK 


OT 6T c6cs ~~ [®40.L OT 6f c6SF [870] 


YS S08  Lb/6z6r ueoy avyy “quaa aad § 
eG <806 > Sere O02 00h 2 re sainjueqoq 
Bo Be Pete oD ASopowyory "quad sad 4b ‘ocd Buiuutdg 32011g yIOK 
6.8 OOLs es yoog wnipuey PEP Sei ai 
ee es Anne ae seq JIpny 6 ZL 6IL °° S86L ‘4249490 YSTE UO JUNOOOW ysuIese ooueleg 
(eas cigs aa fae sesivyg yurg It 0 28— ——— 
Os OF pe OTS) oe hg | 2 6L-008. ate 2100 an LB Ue Ni 
0 9 S250 s5¢ ae soanqoory 8 eT9o aire ASopowyoay 
—: ‘Z1A ‘squowAeg 19419 (je tet iee oe oe see soinyoe'y 
Tile Cole ves ee Suistyioapy ‘ — ‘za ‘sqjdreoey snosurypeostpy ‘* 
© 61S Ee 35 Se ie seseysog ‘ 0°26 ac sounjoA Areusezuey ‘sepeg Aq peasitvey ‘‘ 
OEE 2k sjunoooy Adouotjeyg pure Suyuug ‘ 0-0. ok = sr ay EY squey *S 
0 0 (or4 coe cee coe eee SOLIETVS oe S 9 62 cee eee see Spueplaiq 6é 
Geolieep (6° a SOXVyT, pue sozyey “quey ‘‘ 0-8 onk. es ek suoiydiaiosqng ‘ 
02020) =" sa ‘OJe ‘SesTUeIg JO esduURUEWUILY Ag 6 6 GGe ss: ial? qunosoy 4sej ded sev aourleg of, 
‘GVaV HOSIG HVaV HO 
"IM “TH 


‘S88 “LOV (GNV14GUD SLNANMOGNG IVNOLLVONAdGA 


42 


Z 9 eslF 
0 p SOT see eee ; ore eourleg ee 
0 61 T one see tae “pry Str ULOY ILO NE 6 
060 a see Agjsingy uyor “ . 
0. Ore He eee s sulog “pf [GQ CE AL GE Ae Ae bee Apisqng * 
b 8L pb ae ea (wnipusN) Armory sourep ‘ 9 C98 = aS a suorydraosqng * 
0) SE OL en i (vuomtorg) YSTeMA “et ~ (0) OO ee ie Tet @ SOU 
Or @O Qe ae (‘oye ‘Surjoaery,) sesuedxq Ag —GCZ-p26l 
9 LI OLIs | Omir ao te ey cfs se Sone lest Ob 
6 fe) fo) eee eae eee eee ooUuL[eg ce 9 LI OLLSF 
0 0 ° p00 ese ae yUNOIDW “TOTO AA "7 ce Se Oane 
6 CT 6ST eee see see "010 ‘Surqulig (3 3) 6 ‘val one eee sae Bog 099 ‘sapeg (73 
Oe Gb oer. es os SuistqoApy Ag @ Cnr Wien °° “* -pung wnipueN wory sourpeg Of, 


“MOOd WIAANAN 


Ip = 
"GZBI ‘10q090Q ISTE pepue s1e9z_ 9Y} IO 


“NOILLOUS TVOIDOTIOW HOAV 


“ALAHIOOS IVOIHdOSOTIHd GNV AYOLSIH IVYNLVN LSVATHE AHL HLIM LNNOOOV NI 


Exchanges. 48 


EXCHANGES. 
“Ano Publications of the Abo University Library. 


Baset—Verhandlungen der Naturforschenden Gesellschaft 
in Basel 1922-24. 


BercEN—(Norway)—Publications of the Bergen Museum. 


-BerKeLEy—Publications of the University of Californa. 


BOLOGNA 


Publications of the Royal Academy of Science. 
1923-24. 


BreMEN—Publications of the Bremen Museum. 


Bricuton—Abstracts of Papers of Brighton and Hove 
Natural History and Philosophical 


Society. 1924. 


Brussets—Bulletins of the Royal Society (Botanical) of 
Belgium. 


Burrato—Bulletins of the Buffalo Society of Natural 
Sciences. 


Catcutta—Publications of the Geological Survey of India. 


CAMBRIDGE—Proceedings of the Cambridge Philosophical 
Society- 


Cuicaco—Annual Report of the Field Museum of Natural 
| History. 

CHRISTIANIA—Publications of the Royal University Library. 
Cincinnati—Publications of the Lloyd Library. 


Cotumsus—Bulletin of the Ohio State University. Ohio 
Journal of Science. 


Dubiin—Proceedings of the Royal Dublin Society. 


_kprysurcu—Transactions and Proceedings of the Botanicéal 
Society of Edinburgh, 1923-24. 

GLASGow—Transactions of the Geological Scciety of Glas- 
gow, 1924-25. 


Proceedings of the Royal Philcsophical Society 
of Glasgow, 1922-24. 


44 Exchanges. 
La PLtata—Publications of the National Museum of Natural 
History.. 


LAUSANNE—Memoirs and Bulletins de la Societe Vaudoise 
des Sciences Naturelles. 


Lima (Peru)—Boletin del Cuerpo de le Ingenieros de Minas 
del Peru. 


Lonpon—Quarterly Journal of the Royal Microscopical 
society. 


ae Memoirs of the Royal Astronomical Society. 


MANCHESTER—Journal of the Manchester Geological Society. 
1921-22. 


Orono—Bulletins of the Maine Agricultural Experiment 
Station. 


OrrawA—Publieations of the Geological Survey of Canada, 
Department of Mines. 


Paris—Publications of the Geological Society of France. 


PHILADELPHIA—Proceedings ot the American Philoscphical 
Society. 


Pusa—Scientific Reports of the Agricultural Research In- 
stitute. 1923-24. 


Rennes—Bulletin de la Geologique. 


Rio DE JANEIRO—Publications of the National Museum of 


Brazil. 
San Francisco—Proceedings of the Californian Academy of 
Sciences. 


St. Lovurs—Public Library Monthly Bulletin. 
STRATFORD—The Essex Naturalist. 


TacuspAyA—Annual Report of the National Astronomical 
Observatory of 'Tacubaya. 


Torquay—Transactions and Proceedings of the Torquay 
Natural History Society. 1928-24. 


Warsaw-—Zoological Publications cf the Museum of Poland. 


Exchanges. 45 


WastiIncton—Yearbook of the United States Department 


of Agriculture, 1923. 


Annual Report of the Smithsonian Institu- 
tion. 


Annual Report and Bulletins of the United 


States National Museum. 


Publications of the Bureau of American 
Ethnology. 


Bulletins of the Smithsonian Institution. 


Proceedings of the United States National 
Museum. 


Smithsonian Institution, Miscellanecus Col- 
lections. 


Publieations of the United States Geological 
Survey. 


46 


BELFAST NATURAL HISTORY AND 
PHILOSOPHICAL SOCIETY. 


Officers and Council of Management for 1925-26. 


President; 
Proresson W. B. MORTON, m.a., M.R.1.A. 


Vice-Plrestients ; 
Sir CHARLES BRETT, tu.p. 
S. W. ALLWORTHY, .a., m.p., F.c.s. 
Pror. GREGG WILSON, o.B.£.. M.4., D.SC., PH.D., M.R.I A 
ROBERT IY. YOUNG, J.p., M.A., M.R.I.A. 
J. M. FINNEGAN, B.a., B.sc. 
WILLIAM SWANSTON, F.«:s. 


Gor. Creasurer ; 
W. B. BURROWES, F.n.s. 4.1. 


Won. Librarian : 
ROBERT M. YOUNG, J.P., M.A., M.R.I.A 


Bon. Secretary ; 
ARTHUR DEANE, m.z.1.4. 


Gouncil : 
W. B. BURROWES, F.Rr.s.a 1. 
KE. J. ELLIOTT. 
H. C. LAWLOR, M.A., M.R.1I.A. Retire 
WILLIAM SWANSTON, r.c-s. 1926. 
Proressor GREGG WILSON, p-sc., M.R.I.A. 
JOHN M. FINNEGAN, Ba., BSc. 
Proressor W. B. MORTON, M.A., M.R.1.A. 
F. ADENS HERON, p.t., J.P., F.R.S.A.I. Retire 
ROBERT M. YOUNG, m.a., M.R.1.A. 1927. 
Rr. Hon. 8. CUNNINGHAM. 
Sir CHARLES BRETT, tu.pv. 
T. EDENS OSBORNE, F.R.s.A.I. 
S. W. ALLWORTHY, MaA., M.D., F.C.S. 
WILLIAM FAREN, F-.R.S.A.1. 
ARTHUR DEANE, w.r.1.A., F.R.8.E. 


Retire 
1928. 


Shareholders and Members. AT 


SHAREHOLDERS AND MEMBERS. 
Corrected to November, 1925. 


[*Denotes Holders of three or more Shares. | 


[a - Members of Archaeological Section. | 


Adams, John, Auburn, Cranmore Park Belfast 
*Alexander, Francis, B.E. do. 
Alderdice, ichard Sinclaire, F.c.1.B., 7 Wellington, 

Place, do. 
aAllingham, Robert, 3.p., North Street, do. 


Allworthy, 8. W., m.p., Manor House, Antrim Road, do. 
*Anderson, John, J.r., F.G.S., (Representative of), 
Holywood, Co Down 
«Anderson, Frank, m.b.E., Willoughby Terrace, Pecrtadown 
aAndrews, Michael C., F.R.G.S.. F.R.S.G.S., Orsett, 
Derryvolgie Avenue, Belfast 
Andrew, John, L.D.S., R.S8.C.ENG., 23 University Sq. do. 
aAndrews, Miss Elizabeth, 10 Park Crescent, 
Tonbridge, Kent 


aArcher, Rev. Canon, 3.p., Seagoe Rectory, Portadown 
Armstrong, Hamilton, Corlea, Ashley Park, Relfast 
aAtkinson, Arthur S., Dromana, Knockdene Park, do. 
cBaird, Major William, g.P., Royal Avenue, do. 
Beaumont, Ivor, 4.R.G.A., F.R.S.A., School of Art, do. 
aBennett, S. A., B.A., B.SC., Campbell College, do. 
aBennett, J. L., B.A., Helen’s Pay 
aBerry, Colonel, m.p.1.a., Ardaluin Neweastle 
Bigeer, Francis J., M.R.1.A./ FoR.S.A.1., Ardrigh, 

Antrim Road, Belfast 
Bingham, John A., m.p.s.1., 1, Ashley Avenue, do. 
aBirch, J. P., Ashfield House, Ravenhill Road, do. 
Blair, John G., 38 Victoria Gardens, do. 
aBlake, R. F., F.1.c., 4 Kneck Read, do. 


Boyd, Thornton, Blackstaff Spimning Company do, 


48 Shareholders and Members. 


aBoyd, Miss Kathleen St. Clair, Chatsworth, 

University Road, : Belfast 
Boyd, John, San Remo, Holland Park, Neill’s Hill, do. 
Bradbury, Prof. F., Municipal College of Technology do. 


aBreene, Rev. R. S., Killinchy, Co. Down 
«Brett, The Venerable Archdeacon, m.a., Montrose, 

Fortwiliiam Park, Belfast 
Bristow, John, 10 College Square North, do. 
*Brown, George B., Lisnamaul, Oimeau Road, do. 
Brown, J., M.A., B.SC., 82 Marvville Park, do. 
aBurrowes, W. B., ¥.R.S.A.1., Ballynafeigh House, 

Ravenhill Road, do. 
«Byrne, J. Edwards, J.p., F.8.S.A.1., 37 Royal 

Avenue, do. 


Caiwell, R. I., c.B.E., B.E., M.1I.c.g., Carninard, 


Annadale Avenue, do. 
aCameron, G. A., Institution Road, Colerains 
aCampbell, A. A., F.r.s.A1, Drumnaierrie, Rosetta - 

Park, Belfast 
*Campbell, Miss Anna (Kepresentatives of), do. 
aCarmody, The Very Rev. W. P., Dean of i 

Down, Downpatrick 
Carr, A. H. R., 22a Donegall Place, Belfast 
Carrothers, EK. N., 145 Stranmillis Road do. 
aCarter, C. 8., 7 Knockbreda Road, : do. 
*Charlev. Phineas H., Coolbeg, Cultra, Co. Down 
Clark, Sir George 8., Bart, p.u., Duniambert, Belfast 
aClarke, John, Antrim Arms Hotel, Glenarm 
aCleland, A. MeI., Macedon, Green Road, Knock, Belfast 
Combe, Barbour & Co., Ltd., do. 
aChart, D. A., Litt.p., 12 Malone Park, do. 
aClarke, G. W., m.B.E., 39, Adelaide Park, do. 
Crawford, Rt. Hon. R. G. Sharman, Crawfordsburn 


Cremsinvorrols Ais WE. SBN IGG sSe, Se. 1004S. 
Marlborough Park, Belfast 


Shareholders and Members. 49 


aCromie, Thomas, M.D., Clough, Co. Down 
Cromie, A. G., Seeburgh, Castle Avenue, Belfast 
Crymble, H., 40 Wellington Place, do. 
Founuingham, Right Hon. 8., Fern Hill, Ballygo- 

martin Road, do. 
Cutler, H. A., M.INST.C.E., City Hall, do. 
aDawson, W. R., 26, Windsor Park, do. 
Davies, A. C., Lenaderg House, Banbridge, Co. Down 
Davin, Miss A. G., Glenmore Lodge, Lambeg 
aDavis, Colonel, 21 Malone Place, do. 
Davison, A. H., F.a.1., 832 Wellington Place, do. 
Deans, T. M., uu.p., Academy House, Rosetta, do. 
*Deramore, Lord, p.u., Heslington Park, York 
Despard,.V.D., 10 Academy Street, Belfast 
Devoto, V. A., Kilmorna, Giastonbury Avenuc, do. 
Dixon, Professor, M.A., SC.D., F.R.S., St. Ives, 

Bladon Drive, do. 
Dobbs, A. E., m.a., Kildollagh, Coleraine 
*Donegall, Marquis of (Representatives of), Belfast 
*Downshire, Marquis of. 

Drummond, T. H., 7, Chichester Street, do. 


Dunleath, Lord, Ballywalter Park, Ballywalter, Co. Down 


Earls, Professor J., 3.a., Municipal College of 


Technology, Belfast 
Ewart, Fred W., M.A., B.L., Derryvelgie, Lisburn 
Eiwart, Sir Robert H., Bart., Glenmachan House, PBPelfast 
Thott, David, 3.p., B.A., Ardzoe, Bloomfield, do. 


Elliott, E. J., The Towers. Donegall Park Avenue; do. 


*Wenton, Francis G., 5 Rue Crevaux, Paris 
aFerguson, G. W., C.E., J.P», Carnamenagh, 
Antrim Road, Belfast 


Finlay, Archibald H., a.c.a.1., a.1.e.E., Willesden, Holywood 


Le) Shareholders and Members. 


‘Finlay, Robert H. F., Victoria Square, Belfast 
Finlay, W. J., 10 High Street, do, 
Finnegan, John M., B.A., B.sc., 23 Botanic Avenue, do. 
Fitzsimons, N., F.R.1.B.A., 92 Myrtlefield Park, do. 
Forsythe, J., Lisadell, Cliftonville Road, do. 
aFrazer, Kenneth J., Hillmount. Cullybackey 
alrench, E. J., m.a., St. Anne’s, Donnybrook, Dublin 
Fry, W. Arthur, High Street, Holywood 
Fulton, G. F., Arlington, Windsor Avenue, Belfast 
Geale, R. G., 40 Weilington Park, do. 
*Getty, Edmund (Representative of), do. 
Gibbon, Ltd.-Col. W. D., D-s.0., M.A., Campbell 

College, Belfast 
Gibson, Andrew, F.R.S.A.1., Fairfield, Lansdowne 

Road, do. 
Gibson, S., y.p., Summerhill, Dunmurry, Co. Antrim 
Gibson. W.- E> ©.B-r.. DSC.“ PCa, PAINST Pons 

Street Flax Spinning Co.. Helfast 
Gibson, W. K., 16 Chichester Street, do. 
Goldsborough, J. B., Central Public Library, do. 
Gore, Wm., F.R.S A.I., Municipal College of 

Technology do. 
Gordon, J. 8., p.sc., Ministry of Agriculture, do. 
sordon, Malcolm, Dunarnon, University Road — do. 
Gourlay, R. J., Central Public Library, “do. 
Green, H. Percy, Limehurst, Holland Park, do. 
aGreeves, Arthur, Altona, Strandtown, | do. 
aGreeves, John Theo., Nendrum, Knockdene Park, do. 
aGreeves, W. Leopold, 11 Ormeau Road, do. 
Grogan, J., Junior, 2 Orient Gardens, do. 


Gillmour, J. W., Knocknarea, Kensington Road, Knock 


Harris, Miss 8. M., 25, Hartington Street, Belfast 


Hale, W. Barcroft, 6 Salisbury Gardens, do. 
*Hall, Frederick H.,  ~ Waterford 


Shareholders and Members. BA. 


Hamilton, Rt. Hon. and Rev. Thomas, M.A., D.D., LL.D., 


21 Chlorine Gdns., Belfast 
*Hamilton, Hill, s.p. (Representatives of), do. 
Elanson, W. M. St. John’s Villa, Holland. Park, do. 
Harland, Capt. W., 4 Psalter Lare, Sheffield 
aHastings, 8S. R., 3.e., Church Street, Dowapatrick 
Hastings, Archibald, 7 Cavehil! Road, Belfast 
Hawthorne, John, B.A., PH.D., F.I.c., 16 Donegall 

Square S., do. 
Hayward, Harold R., ¥F.r.s.a.1., Hopefield House, 

Antrim Road, — do. 
Henderson, J. W., m.a., Methodist College, do. 
aHenry, Professor R. M., M.a., M.R.1.A., Crosshill, 

Windsor Avenue North, do. 
aHenry, T. W., F.s.aRcH., Greenbank, Mount- 

pleasant, do. 
Herdman, E. C., Carricklee House, Strabane 


*Herdman, Robert Ernest, 3.p., Merronburst, 
Craigavad, Co. Down 
@ateron, i: Adens,-D.:L.,°.J.P., F.R.S.A.I., 


Maryfield, Holywood 
ailewton, John, M.p.s.1., Ava Pharmacy, 3815 Ormcau 

Road, Relfast 
Heyn, James A. M., Head Line Buildirgs, slo: 
Higginson, R. E., U.S.P.C.A., Carnmoney 
aHill, S. W., m.p., 46 Pound Street. Larne 
Hind, John, 22 Cliftonville Road. Belfast 
aHogg, A. R., 10 Thorndale Avenue, ‘ do. 
donneyman, Wm., B.SCc., (LOND.), F.1.c., 18 Halstein 

Drive, Ballyhackemore, do. 


Hoskins, A. Percy, F.1.c., F.c.s., 14 Rosetta Park, — do. 


-*aBlakiston-Houston, Major C., 3.p., Mycde, 


| Bloomfield, do. 
*Hughes, Kdwin, Craigavad (Representatives of) Co. Down 
Hummel, Professor, M.sc., AM.I C.E., Queen’s 
University, Belfast 


o2 Shareholders and Members. 


Hunter, Dr. J. A., Hampton Cottage, Balmoral 


Avenue, Belfast 
Hunter, William, g.p., Fortwilliam Villas, do. 
James, Wm., L.p.s., 98 Gt. Victoria Street do. 
Jamieson, Andrew (Andrew Jameson, Lid.), 

Sandy Row, : do. 
Jenkins, J. C., 86 University Road, do. 
aJohnston, HE. C., F.R.s.a.1., Glenmount, Newtownards 
*Jones, H. H., 3 Wiimont Terrace, Belfast 
aJury, P. M., Brooklands, Dunmurry 
dJennings, V. G., Wellcroft, Sandown Road, ‘Knock 


*Kinghan, John R., Windsor Avenue (Repre- 


sentatives of), Belfast 
Kinkead, G. W., 9 Donegall Square S. do. 
eKnox, Major 8. W., bu-B., Glenburn, Dunmurry, do. 
Kyle, Robert Alexander, 15 Wellington Park, do. 
aLamb, G. C., Leura, Finaghy, do. 
aLawlor, H. C., mM.a., M.R.1.4., 8 Windsor Avenue do. 
aLawlor, Mrs. H. C., 8 Windsor Avenue, do. 
aLepper, R. 8., M.A., F.R.HIST:S:, LL.M., F.R.S.A.L., 

Elsinore, Crawfordsburn, Cc. Down 


Lewars, D. B., 17 Dundela Gardens, Bloomfield, — Belfasu 
Lindsay, Professor J. A., M.A., M.D., F.R.C.P., 


Queen’s Elms, | do. 
Livingstone, R. W., M.A., D.LITT., M.R.I.A., Elmwood 
House, do. 


aLoewenthal, John McC., Lennoxvale, Malone Roaa, do. | 
«Londonderry, The Marquess of, Mount Stewart, 


Newtownards 
aLondonderry, The Marchioness of do. do. 
Loughridge, James, 173, Clitfonville Road, Belfast 


Logan, Jas., M.A., F.R.G.8., Greystone, Ravenhill Pk., do. 


Shareholders and Members. 53 


Lowry-Corry, Hon. Cecil, Castle Coole, Enniskilen, 
Co. Fermanagh 


aLowry, David E., Oakley, Strandtown 
*Macrory, A. J. (Representatives of), Belfast 
aMagill, Mrs. A. P., 9 Wilmont Terrace, Lisburn 

Road, do. 
aMagill, Hugh, 217 Cavehill Road, do. 
Magill, John E., Eversley, Whitehead 
aMackic, James, 3.p., Albert Foundry, Belfast 
Malcolm, Bowman, M.1.C.B., M.I.MECH‘E., Inver, 

Ashley Park, Antrim Road. do. 
Malcomson, Herbert, Riverside, Holywood 
Maxton, James, M.I.N.A., M.I.MAR.E., 6 Kirkliston 

Drive, Belfast 
aMayes, William, Kenmuir, 12 Deramore Park South, do. 
Mayne, H. Horner, 24 Elmwood Avenue, do. 
Mercer, 8. P., Hanging Leaves, Jordanstown 
aMercier, Mrs. W. C., Garvock, Green Road, Knock 
aMerrick, A. 5., 82 Wellington Park, Belfast 
Metealfe, A. W., Hawthornden House, 

Hawthornden Road, do. 
Milligan, A., 4 Cooks Street, do. 
Mitchell, Robert A., Lu.B., T.c.D., Marmont, 

Strandtown, do. 
Moneypenny, Sir Frederick, c.B E., c.v.o., City Hall, do. 
aMontgomery, Miss E. 8., 26 College Green, do. 
aMontgomery, H. C., F.n.s.a.t., 40 Rosemary Street, do. 
aMontgomeryv, H. H., 19 Malone Park, do. 
aMorton, Professor W. B., M.A , M.R.1.A., Glencarse, 
 Nottinghill, do. 
Mur, A. H., F.c/a., 7 Donegall Squar> West, do. 
Muskett, A. E., 12 Belgravia Avenue, do. 
Mullan, Wiiliam, Lindisfarne, Marlborough Park, do. 
*Murphy, Isaac James (Representatives of), Armagh 


Maxwell, W. C., a.R.1.B.A., 29 Donegall Street, Belfast 


'54. Shareholders and Members. 


“Murphy, Joseph John (Representatives of), Belfast 
“Musgrave, Henry, p.u. (Reps.), Drumglass, Malone, do. 
aMacalister, Professor, R.A.S., D.LITT., M.A., 18 Mount 


Eden Road, Donnybrook, Dublin 
McBride, A. H., Ormeau Avenue, Belfast 
“McCalmont, Robert (Representatives of), Londen 


“McCammon, Thos. P. (Representatives cf), 
Woodvale, Holywood, Co. Down 
McCance, Captain Stcuppe, 4 Markham Square, 
London, S.W.3. 


McCaughey, John, 79 Somerton Road, Belfast 
MacConaill, Michael, B.sc., 17 Fleetwood Street, do. 
aM‘Coy, B. J., F.R.Sai., 84 Smithfield, do. 
McCoy, W. R. S., 27 Damascus Street, do. 
*McCracken, Francis (Representatives of), 
aMcCready, H. L., m.a., 104 Myrtlefield Park, do. 
McDowell, Chas, Stephen, sB.sc., 33 Wellington Park, do. 
McGill, J. F., Ardoyne Cottage, Ardoyne, do. 
aMcGowan, Thomas, 738 Ann Street, do. 
Mellveen, J. H. M., Irene, Parkmount Road, PAO. 
Macllwaine, Dr. John E., 26 College Gardens, do. 
aMcKisack, H. L., m.p., Chiorine Place, do. 
aMcKisack, C. J., 9 Mount Pleasant, do. 
MacLaine, Alexander, J.P., Quecn’s Elms 

(Representatives of), do. 
MacLane, L., Rathcline, Annadale Ave., Belfast 
aMcMeekin, Adam, j.p., Cogry House, Doagh 
MacMillen, Rev. J., M.A., D.D., 151 Ravenhill Road, Belfast 
McMullan, C., Bangor Road, Hoiywood 
McMullan, P. J., 3.p., Churchfield, do. 
aMeNeill, George, 12 Deramore Park, Belfast 
aNeill, F. F., 35 Candahar Street, do. 
Newell, J. F., 25 Lombard Street, do. 
MacConaill, M., B.sc., 17 Fleetwood Street, do. 
MacLaine, L., Rathcline, Annadale Avenue, do. 


Nicholl, William, 10 St. James’ Street, do. 


Shareholders and Members. 55 


Neble, R. S. H., m.a:, Lisnaton, Suffolk, Dunmurry 
aNolan, Dr. M. J., Resident Medical Super- 

intendent, Asylum, Downpatrick 
Orr, James, M.B.0.U., 17 Garfield Street, do. 


aQsborne, T. Edens, F.z.s.a tr, 4 College Square N. do. 
Owen, D. J., 22 St. John’s Pari, Blackheath, London 


Patterson, John F., 2 Mountcharles, Belfast 
Patterson, Robert, M.R.1.A., F.Z.S., M.B.O.U., 

(Glenbank, Holywood 
Patterson, William H. I'., Auburn, Warren 


Road, Donaghadee 
aPereival, R. D., 3.p., Karyhill, Downpatrick 
Emmkerton, H.-S., B.A., B.E:, A:M.1.c.E., Oak Lodge, 

Cedar Avenue, , Belfast 
Pomeroy, A. G., m.a., Arnside, Dundonald 
Porter, J. W., 35 Templemore Avenue, Belfast 
Porter, 5. C., 112 Eglantine Avenue, do. 
Porter, Mrs.., do. do. 
Pryce, A. R. Rhys, F.R.8.a.1., 2 Royal Terrace, do. 
Rafter, H. L., 29 Fitzwilliam Strect, do. 
Rangecroft, J.. 2 Derryvolgie Avenue, do. 
Rhynehart, John G., F.R.c.sc.1., 138 Ashley Ave., do. 
aRiddell, Alexander, 12 Lower Crescent, do. 
awRippingham, T. F. O., a.r.1.8.A.. 1 Mount Pleasant, do. 
aRitchie, John, Cullintra, Comber 
Roberts, J. R., 48 Fitzwilliam Street, Belfast 
Robertson, G. 8., D-sc., Queen’s University, do. 
Robinson, EK. G., 1 Ashville, Inver Avenue, Antrim 

Road, % oe 
aRobinson, A., Corleen, Donegali Park, Beifast 
aRaines, Colonel, Ardview, Killinchy, Co. Down 
Rice, Capt. J. P., n.sc., Stormont, Strandtown, Belfast 
Riddell, W., u.a.. 51 Myrtlefield Park, 10. 


«Roden, Countess of, Tullymore Park, Newcastle, Co. Down 
aRutherford, Rey. J. C., B.a., My Lady’s Road, Belfast 


56 Sharcholders and Members. 


aSalter, Victor, 6 Pickie Terrace, Bangor 
aSalter, Mrs. V., 6 Pickie Terrace, du. 
Savage, Arthur, Westhorp, Cherryvalley, Belfast 
Scott, James, B.E., Craigtara, Annadale Avenue, do. 
aSearle, G. O., B.sc., Research Institute, Glenmore, 

House, . Lambeg 
aShanks, E., Fernagh, Saintfield Road, Belfast 
aSheridan, Wm., 9 Roe Street, Cliftonville, do. 
Sinclair, Professor Thomas, M.D., F-R.c.S., Eng., 

University Square, do. 
aSinclair, Thomas, J.r., Lisburn 
aSkillen, Joseph, 25 Stranmillis Gardens, Belfast 
Small, Professor James, D.SC.. M R.I.A., PH.C., 

Ardeolm, Green Road, Knock, do. 
Smith, J. D., 3.P., M.t.c.£., Oakleigh, Ravenhill Road, do. 
aSmith, R. Ingleby, c.£., 57 Eglantine Avenue, do. 
Stanlev, Major Rupert, LL.D., B.A., M.I.E.E., F.I.BE.. 

Education Office, do. 


Steen, William, B.L., Roseberry, Marlborough Park, do. 
aStephens, Captain, J. K., g.p., 18 Donegall Square 


North do. 
aStevenson, John, Coolavin, Malone Road, do. 
Stirling, James H., Mount Randal, — do. 
Stewart, A. W., Seaforde, Park Road, do. 
Strahan, Thos. Sherlock, B.sc., The Manse, Newry 
aSymmers, Professor W. St. C., M.B., 23 Windscr 

Avenue, Belfast 
Scott, H. C., Rashee Road, Ballyclare, Co. Antrim 
Sheils, Rev. J. F., Carrickmannon, : Ballygowan 
alate, T- Mi ai.p., Ininmany Elouse, Downpatrick 
*Tennant, Robert (Representative of), Rushpark, do. 


*Tennent, Robert James (Representative of), 

Rushpark. do. 
Thomas, J. l., g.p., 4 Downshire Park, Bangor 
aThompson, Edward, Prosepct Mills, Belfast 
Thompson, John, s.p., Mourtcollyer, Malone Road: sider 


Shareholders and Members. 57 
aThompson, Joseph Altorf, Holywood Road, Belfast 
Thompson, J. M., 4 Miiton Terrace, Wolseley Street, do. 
Thomas, Trevor C., 34 Arthur Street, do. 
aTorney, H.C. 8., F-r.s.a.1., The Moat, Holywood 
Totten; J. H., B.A., B.sc., F.I.c., 16 Donegall 

Square 5., Belfast 
Rorrense la. D.L:, J.P., Edenmore, Jordanstown 
Trimble, Dr. A.;3.P., Tyr Owen, Downview Ave., Belfast 
Todd, Robert G., 1 Mount Easton, Cliftonville, do. 
aTurner. 8., junior, 142 Cliftonpark Avenue, do. 
*Purnley, Francis, Drumnasole, Carnlough 
aWalmsley, Prof. T., m.p., Queen’s University, Beltast 
aWallace, Colonel the Rt. Hon. R. H., c.B., p.1-, 

Myra Castle, Downpatrick 
“Webb, Richard (Representative of), Knock, Belfast 
aWelch, R. J., Mm.sc., M.r.1.A., 49 Lonsdale Street, do. 
Whitaker, W. Martin, x.c., m-a., 4 Castleton Terrace, do. 
White, Charles E., 3.p., 10 Donegall Square West, do. 
White, G. W., Chatsworth, Balmoral Avenue, do. 
Whitla, Sir William, m.p., 3.p., Lennoxvale, do. 

ra Nolsom, Prof. Gregg, 0.B.E., M-A., PH.D., D:SC., 

M.R.I.A.. Queen’s University, do. 
aWilson, George, 17 Bedford Street, do. 
*Wilson, W. Percival (Representative cf), do. 
*Wolff, G. W. (Representatives cf), do. 
Woodhouse, William, 24 Evelyn Gardens, Cavehill 

Road, do. 
Workman, Francis, p.u., 'The Moat, Strandtown, do. 
Whitham, Miles R., Chamber of Commerce, do. 
Workman, W. H., M.B.o.U., F.z.8., Lismore, Windsor 

Avenue, do. 
*Workman, Robt., Craigdarragh, Helen's Bay 
Workman, W., 8 Corporation Street, Belfast 
Wren, Prof. H., m.a., p.sc., PH.D+, Municipal College 

of Technology, do. 


Wright, W. S., 71 Marlborough Park, do. 


58 Shareholders and Members. 


HONORARY MEMBERS. 


aBrett, Sir Charles H., tu.p , Gretton Villa, S., 


d’Albe, Fournier, p.sc. Lond. & Birna.), Ask. CSc: 
M.R.I.A., ‘I'he Hermitage, Portsmouth Road, Kingston 


Crone, Dr. J.S., J.2., MRA. 34 Cleveland Road, 


Kaling, London, W. 
uDeane, Arthur, F.R.8.., M.k.1.A., Mount Nephin, 
Newtownbreda 


Foster, Nevin H., M.R.1.A., F.L.S., M.B.O.U., 
Hillsborough, Co. Down 
aStendall, J. A. S., M.B.o.u., Museum, College Sq., Belfast 


Swanston, William, f.a.s., Farm Hill, Dunmurry 
a*Young, Robert Magill, 5.P., M.A., M«R.I.A., F.R.S.A.L., 
F.R.1.B.A., Rathvarna, Belfast 


ANNUAL SUBSCRIBERS OF TWO GUINEAS. 


Belfast Banking Company, Ltd., Belfast 
Northern Banking Company, Ltd., do. 
Ulster Bank, Ltd., do. 


[The Hon. Secretary will be obliged if shareholders ana 
members will notify him in the event of change of address, 
or of any inaccuracies appearing in the names and addresses 
in the list. Address:—The Museum, College Square North, 
Belfast. ] 


Ca eh ten na eRe Na a a 
Sacer caer Er 
F BRITISH 
MUSEUM 
7 Sieg EN 7a 
f oy } eel 2 6 


Bio ta 
: 
| NATURAL 


The Belfast Natural History and 
Philosophical Society Centenary 
Volume 1821-1921. 


_ A Review of the Activities of the Society for 100 years with 


Historical Notes, and Memoirs of many Distinguished Members 


| TEVVEN PY -EIGHT, CONTRIBUTORS. 
ldited by Arthur Deane, M.R.I.A., F.R.S.E., Hon. Secretary. 


Demy 8vo. 
Price 7/6. 


212 pages with over 40 illustrations. 


(By Post 8/-) 


A Book of Great Value to all interested in the progress of Belfast. 


Extracts from Press Notices. 


Lorvthern Gd hig. 
mo. it as -indeed a volume..of 
hich not only those dead-and-gone 
d founders; .. . our contemporaries 
to-day might well be proud, but it 
1iould also be a source of pride to all 
ithe town, as evidence and a history 
its intellectual aspects. . mae 
30k is, in short, one that all ought to 
ossess as @& buckler to their self- 
sspect. 


eekly Aorthern Whig. 

the work contains a wealth of 
formation regarding the progress of 
jientific education and forms a 
sry valuable addition to our Northern 
terature. 


| jelfast Neius- etter. 


".. . The biographies of leading 
embers are a very valuable feature, 
3 they give facts not readily acces- 
ble elsewhere. . . Special attention 
iay be called to the portraits and 
_lustrations ee her hditor . amd 
-wmtributors have rendered a service to 
je citizens in compiling this history 
fa most useful Society. 


he (tiness. 


.. The volime is enriched with 
ver 40 pages of portraits and other 
jlustrations, and the whole forms a 
- 2cord that shows that Belfast has not 
een entirely. engrossed with commer- 
al and industrial pursuits. Jak 
_ lemorial perpetuating the name and 
ime of men who have achieved dis- 
imetion for themselves in the sphere 
f intellect and brought honour to the 
ity, which was at one time stvled the 
orthern ewes, 


ne ae 


Irish eins. 


. is one of the most interesting 
and valuable books ever published in 
Belfast. . .. The illustrations are 
excellent; they include portraits of 
Belfast celebrities whose names live in 
the city’s history. 


Belfast Celegraph 


a valuable addition tc the 
literature of Old Belfast . . abounds 
in information concerning the Belfasu 
of long ago The entire volume 
is profusely illustrated, some of the 
prints of Old Belfast being most in- 
teresting. 


Mvish Boohk-Lober. 


. handsome, well-turned-out, and 
valuable volume. A notable fea- 
ture of the book is the many well- 
reproduced illustrations of portraits, 
scenes, and book-plates, the whole 
forming an excellent work of reference 
of which the city should be proud. 


Si Hynden Mlacassey mm 

Aoarthern hig. 

No one who reads, as I have done 
with swelling pride, the interesting 
and inspiring Centenary Volume pub- 
lished by the Belfast Natural History 
and Philosophical Society, can ever 
doubt that Belfast can always be relied 
on, in the future as in the past, to 
raise a stock of capable and far-sighted 
leaders in industry and commerce, who 
will maintain the trade of the city 
against the world. 


ae ee eres fom ee 


i os by VW ERSKINE 
DONEGALL SQUARE WEST, BELFAST. 


MAYNE, Bookseller