250 ANNUAL OF SCIENTIFIC DISCOVERY. 



calico printer and the woolen manufacturer. In the class of pigment- 



Erinting work,- which is indeed a species of painting, the colors are 

 dd on the face of the goods in an insoluble condition, so as to present 

 a full, brilliant face. As a vehicle for effecting this process of decora- 

 tion, the insoluble albumen obtained from eggs was always used, until 

 Mr. Pattison, of Glasgow, found a more economical substitute in milk. 

 For this purpose, buttermilk is now bought up, in large quantities, 

 from the farmers, and the required insoluble matter is obtained from 

 it at a price far below that of the egg albumen. This matter the 

 patentee has called " lactarine." A second application of the same 

 article, milk, has just been developed, by causes arising out of the 

 recent high price of olive oil. The woolen manufacturers are now 

 using the high-priced article, mixed with milk. This mixture is said 

 to answer much better than oil alone, the animal fat contained in the 

 globules of the milk apparently furnishing an element of more power- 

 ful effect upon the woolen fibers, than the pure vegetable oil alone. 

 Lond. Mechanics' Jour. 



ADULTERATION OF SULPHATE OF QUININE. 



At present, a great quantity of quinine containing quinidine is met 

 with in commerce. The sulphate of quinidine is much heavier and 

 less flaky than sulphate of quinine. The sulphate of quinidine is far 

 more soluble in water and absolute alcohol than the other salt ; when 

 exposed to the air, it loses its water of crystallization, without acquir- 

 ing an effloresced appearance, remaining crystalline. As a distinction 

 between quinine, cinchonine, and quinidine, the author states that a 

 mixture of 60 drops of ether and 20 drops of solution of ammonia 

 dissolves at least 10 grs. of pure sulphate of quinine, but only 1 gr. of 

 sulphate of quinidine. If, therefore, sulphate of quinine, containing 

 cinchonine and quinidine, be thus tested, the two latter will remain if 

 there be more than 1 gr. of sulphate of quinidine in 10 grs. of the 

 salt. Even this small quantity may be ascertained if the ether be pre- 

 viously saturated with quinidine. Quinidine is distinguished by crys- 

 tallizing from the ethereal solution after a certain time : it may be dis- 

 tinguished from cinchonine by its being dissolved on the addition of 

 a larger quantity of ether, the cinchonine remaining undissolved. 

 Bucliner's Itepert., i. p. 143. 







ADULTERATION OF LARD. 



A communication has been received by the London Pharmaceutical 

 Society, on the above subject, from Mr. Whipple, in which he states that 

 for some time past he has had reason to suspect the purity of commercial 

 lard, and had recently made a few experiments, which led to the de- 

 tection of large quantities of some farinaceous substance in it. In a 

 quantity weighing 105^ Ib. he found as much as 22^ Ib. of this foreign 

 matter; and in another lot, weighing 43| Ib., he found 12| of a simi- 

 lar substance. Mr. Whipple points out the pernicious effects which 



