LIST OF ILLUSTRATIONS.

1. KiriHloy'it document camera, ....... 3
2, Bmocwlar microscope, . . . . . . .8
3, WatHon'g duplex photo-niicrographic camera, .... 9
4. Ward's apparatus, . . . . . , . . .11
f>, Kow micrometer, . . . . . . . . .12
<k Filar micrometer, ......... 12
7. Loviboncl's tintometer, ........ 14
8. Onbom's comparison microscope, . . . . .15
I). Water mark, A.B.1340,........21
10. Water mark, nixteenth century, ...... 21
11. Water mark, fifteenth century, ...... 22
12. Water mark, sixteenth century., ...... 22
13. Cotton fibres,..........29
14* Linen fibres,....... . . . .29
15. Hemp fibres...........30
10. Manila fibres,..........30
17. Jute fibres, . . '........30
18. Pine wood,..........30
It). Poplar wood, showing vessels, . . . . . . .31
SiO. Mechanical wood pulp, . . . . , . . .31
21 • Ewparto, H!IOwing hairs and serrated cells, . . . . .32
22. Htraw, whowing oval and serrated cells, ..... 32
2.1. Wool flbre,..........32
24. lrik«, Egyptian palette, brushes, and pens, ."'.'. . .39
25. Btrokew made with various types of pens, . . . . .44
26. Eighteenth century iron-gall ink, ...... 52
27. Modern blue-blaok ink, . . . .- . . . .54
28. Priority of writing shown by sequence of strokes, . . .68
20. Mex v. Cohen. Entries in ledger, showing sequence of strokes, . 68
:K). Behaviour of old and recent inks with a reagent, . . .71
:ti. Page of Gesnar's book, showing pencil,.....88
32. Mark made by old Borrowdale graphite,.....94
xi