make a nitro-cellulose which shall be either entirely soluble or entirely
insoluble, or which will contain the theoretical content of nitrogen to
suit any of the above formulæ for the cellulose nitrates. Prof. G. Lunge
gives the following list of nitration products of cellulose:--

[Footnote A: The penta-nitrate C_{12}H_{15}O_{5}(NO_{3})_{5} = 12.75 per
cent. nitrogen.]

[Footnote B: In the Cordite Trial (1894) Sir F.A. Abel said, "Before 1888
there was a broad distinction between soluble and insoluble nitro-
cellulose, collodion-cotton being soluble (in ether-alcohol) and
gun-cotton insoluble." Sir H.E. Roscoe, "That he had been unable to make a
nitro-cotton with a higher nitrogen content than 13.7." And Professor G.
Lunge said, "Gun-cotton always contained soluble cotton, and _vice
versa_." These opinions were also generally confirmed by Sir E. Frankland,
Sir W. Crookes, Dr Armstrong, and others.]

Dodeca-nitro-cellulose C_{24}H_{28}O_{20}(NO_{2})_{12} = 14.16 per cent.
nitrogen. (= old tri-nitro-cellulose)
Endeca-nitro-cellulose C_{24}H_{29}O_{20}(NO_{2})_{11} = 13.50 per cent.
nitrogen.
Deca-nitro-cellulose C_{24}H_{30}O_{20}(NO_{2})_{10} = 12.78 per cent.
nitrogen.
Ennea-nitro-cellulose C_{24}H_{31}O_{20}(NO_{2})_{9} = 11.98 per cent.
nitrogen.
Octo-nitro-cellulose C_{24}H_{32}O_{20}(NO_{2})_{8} = 11.13 per cent.
nitrogen. (= old di-nitro-cellulose)
Hepta-nitro-cellulose C_{24}H_{33}O_{20}(NO_{2})_{7} = 10.19 per cent.
nitrogen.
Hexa-nitro-cellulose C_{24}H_{34}O_{20}(NO_{2})_{6} = 9.17 per cent.