BYE-PRODUCTS OF MILK OF MINOR IMPORTANCE. 295 



chalk, and water. Emulsions of olive oil in milk are used in the 

 manufacture of wool, for the purpose of adding fat to the wool. 



Lactarine, or casein gum, is almost pure casein specially prepared, 

 which, when dissolved in ammonia, is used for fixing and thickening 

 colours in calico printing. Casein lime, or casein cement, is made 

 out of skim-milk cheese very poor in fat. It is very useful, and 

 is much used in carpentry. The cheese is cut into small morsels, 

 quickly dried, and ground into a fine powder, which is mixed with 

 20 per cent of burnt chalk. If it be desired to keep it for some 

 time, it must be put into closed vessels and mixed intimately with 

 not more than 1 per cent of camphor. Casein lime comes in fair 

 quantities from Switzerland. 



Lactite, or milk ivory, is a hard horny substance prepared from 

 casein. Attempts are at present being made to introduce it for 

 technical purposes. The author has a black button made from this 

 substance, which is externally indistinguishable from a common 

 bone button. Whether this is a lucrative application of casein, and 

 whether the new substance is able to replace horn or bone, remains 

 to be seen. 



