e upper roll, tin, 10 peroxyd of manganese, 10 Indian red, 5 Parts operation of impressing upon a metal plate or surface white, 8 rice starch, 10 gum arabic, 2 bichromate of and 6 the lower roll. The bearings in which the roll, by suitable machinery, those parts which it is desired b, turns are… … ished, it is floated with the and sliding upon steel bars, 7. back downward upon water The steel bars, 11, arefixed to the, framing ‘of the machine at & k, and are elastic, in a suitable vessel ; and when, upon examination, the powdered emery, 10 Indian red, 10 peroxyd of man- glutinous material…
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