220 IV. OILY COMPOUND COMBUSTIBLES.— 



52. Boil lb. j of cochineal powdered, and 5vj of alum in 401b. of 

 water, strain the decoction, add "^ss of dyers^ spirit, and after the 

 carmine has settled, decant the liquid and dry the carmine: this 



Erocess yields about Jjss ; used as a paint for the ladies, and also 

 y miniature painters. 



Cheese, Caseus. Separated from milk by the addition of ren- 

 net, or the juice of rubiaceous and some other plants, and subse- 

 quent straining; for the purpose of keeping it, it is generally 

 salted and pressed. There are many varieties of it, arising from 

 the addition of cream to the milk, or its subtraction from the milk, 

 the separation of the whey with or without compression, the salting 

 of the curd, the breaking of the curd, or not, before pressure, the 

 making with pressure or without, the colouring with saffron or 

 annotto, the keeping, &c. 



DISTILLED ANIMAL OILS. 



Oil of hartshorn, Oleum cornu cervi. From harts'' horns, 



Dippel's oil, Animal oil, Rectified oil of hartshoi-n. Oleum. 

 Dippelii, O. animale, O. cornu cervi rectijicatum. From oil of 

 hartshorn, by a slow distillation, in a retort no bigger than is 

 necessary, and saving only the first portion that comes over ; very 

 fine and thin, and must be kept in an opaque vessel, or in a drawer 

 or darker place, as it is quickly discoloured by light ; antispas- 

 modic, anodyne, diaphoretic, gtt. x — xxx in water; externally 

 stimulant. 



Oil of boxes. Oleum ossium. Very fetid, burnt in lamps for 

 making English lamp-black, and also used for lighting mines. 



Butter of wax, Butyrum cerce. Distilled from bees' wax : 

 concrete. 



Oil of wax, Oleum cerat. From butter of wax, by redistilla- 

 tion: liquid. 



OF mineral origin. 



MINERAL OILS. 



Nafta, Naphtha, Oleum petrce album. Pale yellow, fine, thin, 

 very inflammable ; found in Persia, Italy, and other places. 



Artificial nafta. From coal tar, by distillation ; used for 

 lamps. 



Oil of petre. Rock oil, Huile de Gahian, Petroleum, Oleum 

 petrcB, Red or brown ; found in Persia, France, and other 

 places. 



Coal oil. Petrol. Floats on the water in which coal-gas 

 gasometers are placed ; from coal-tar by distillation ; used for 

 lamps. 



