50 THE STOCKFEEDER'S COMPANION 



Brazilian is probably the largest seed and can be obtained 

 practically free from cotton lint. Egyptian seed is com- 

 paratively large, with very little cotton lint adhering to 

 the narrow end of the seed. Salonica seed is somewhat 

 smaller, but some of the seeds are covered with cotton 

 lint, which prevents one seeing the colour of the husk. 

 Bombay seed is a comparatively small seed, and the 

 seeds are completely covered with cotton lint, with the 

 result that they look like small balls of cotton. 



In America, and to some extent in this country, 

 solvents such as naphtha, benzene, etc., are used to 

 extract the oil instead of pressure, with the result that 

 a larger amount of oil is extracted. In some cases 

 both solvents and pressure may be used. The 

 residual cake contains a smaller percentage of oil, but 

 a correspondingly higher percentage of albuminoids. 

 Generally speaking, the poorer a cake is in oil, the 

 harder it will be. 



The extracted oil is of a pale yellowish colour, and 

 possesses a pleasant flavour. At present it is largely 

 used for the manufacture of soap, lubricating oils, and 

 in one or two cases as a cream substitute for calves. 

 It differs from linseed oil in being a "non-drying" oil. 

 During this process of oil extraction the leathery husk 

 may be screened out, when the residue cake obtained 

 is decorticated or " dehusked " cotton cake, as in the 

 case of American seed. The Bombay and often the 

 Egyptian seed, are not usually decorticated, hence the 

 resulting cake residue is called undecorticated. 



The process of oil extraction is very similar to that 

 employed for linseed, but the meal in the kettle requires 

 to be heated to a higher temperature, to facilitate the 

 extraction of oil. Further, the hulls of cotton seeds 

 are very hard and indigestible, consequently they require 



