Cellulose, 2, 47.

Celluloid manufacture, 91. analysis, 230. cartridges, 91. uses of, 90. Field's papers on, 93. fibre for, 94. nitration of fibre, &c., 95. formula of, 57.

Champion and Pellet's method of determining nitrogen, 223.

Chenel's modification of Kjeldahl's method, 227.

Collodion-cotton, 79.

Comparative tests of black and nitro-powders, 193.

Compressing gun-cotton, 77.

Composition of waste acids from nitro-glycerine, 43.

Composition of some common explosives, 290.

Conduits for nitro-glycerine, 7.