METHODS OF MEASUREMENT 7
igler (1885), Arrhenius (1887), Ostwald (1893), Gartenmeister (1890)
sydweiller (1895), Friedlander (1901), Mclntosh and Steele (1906)'
wikine (1910).
(c) Efflux through a bent capillary. Grfineisen. (1905).
(£) Bending of beams and torsion of rods of viscous substance. Trouton
906), Trauton and Andrews (1904).
(e) Itate at which one substance penetrates another under the influence
capillary action, diffusion, or solution tension.
3. Other methods for measuring viscosity:
(a) Decay of oscillations of a liquid in U-shaped tubes. Lambert (1784).
00 Decay of waves upon a free surface. Stokes (1851), Watson (1902).
(c) Decay of vibrations in a viscous substance. Guye and Mintz (1908).
<<*) Rate of crystallization. Wilson (1900).
ITomenclature.—A. great variety of names have been given to
struments devised for measuring viscosity, among which we
ay cite viscorneter, viscosirneter, glischrorneter, microrheom-
3r, stalagnometer, and viscostagnometer. All but the first
"0 are but little used and their introduction seems an unneces-
:y complication. Viscorneter and viseosimeter are about
ually used in England and America,, but such a standard work
Watt's Dictionary uses only viscometer. Viseosimeter in its
5rin.au equivalent Viskosimeter is entirely satisfactory, but
English viseosimeter is apt to be mispronounced viscos-
eter. Furthermore viseosimeter does not so easily relate
elf in one's mind to viscornetry which is the only word recog-
:ed in the standard dictionaries to denote the measurement
viscosity. Professor Brander Matthews kindly informs rne
it the formation of the word viscometer is quite as free from
jection as that of viseosimeter, and viscometer is in harmony
bh modern spelling reform. Hence viseometer should be
opted as the name for all instruments used for measuring vis-
sity. The different forms are distinguished by the names of
jir inventors.