The process may be roughly described as follows: Cotton seed cake contains a certain quantity of mois ture, oil and the protelds already mentioned. 'These are partly driven off by roasting, the resultant char retaining "nitrogen in combination with carbon, Carbonate of potash, of which abundant quantity can be derived from the ash of hulls, as mentioned before, is fused and' the char entered together with an admixture of iron as oxide or metallic shavings. In the fusion mixture nitrogen combines with Potassium and carbon into potassium cyanide which in turn combines with the iron into potassium ferry cyanide, a complex salt known as. yellow prussiate of potash, This can be used aS a source for other valuable cyanides, but ils most useful application is for the manufacture of Prussian Blue, an intensive blue colour of great fastness which is widely used textiles as well as paints and inks. From the present cotton crop can be derived a sufficient quantity of Cyanides and Prussian Blue to cover the entire requirements of the country.
To close the circle of useful pro-duets, the residue left after fusion has taken place and the salts formed have been dissolved out, consists of char with strong refining and de-dorizing action on oil which can be employed tore fine the dark brown cotton seed oil from the seed,
Text read from the printed page and cleaned; old type leaves the occasional error.