CHAPTER III

METHODS OF PRINTING 30

Impression on polished glass or razor 30

The two contrasted methods of printing 31

General remarks on printing from reliefs--ink; low relief of ridges; layer of ink; drying due to oxidisation 32-34

Apparatus at my own laboratory--slab; roller; benzole (or equivalent); funnel; ink; cards 35-38

Method of its manipulation 38-40

Pocket apparatus 40

Rollers and their manufacture 40

Other parts of the apparatus 41

Folders--long serviceable if air be excluded 42

Lithography 43

Water colours and dyes 44

Sir W. Herschel's official instructions 45

Printing as from engraved plates--Prof. Ray Lankester; Dr. L. Robinson 45

Methods of Dr. Forgeot 46

Smoke prints--mica; adhesive paper, by licking with tongue 47-48

Plumbago; whitening 49

Casts--sealing-wax; dentist's wax; gutta-percha; undried varnish; collodion 49-51

Photographs 51

Prints on glass and mica for lantern 51

Enlargements--photographic, by camera lucida, pantagraph 52-53