LIQUOR OF THE ALLANTOIS. 533 



The portion of the extract insoluble in alcohol was dissolved 

 in water, and the solution left in repose in a cold place ; but no 

 crystals were deposited even after an interval of several days. 

 It was not precipitated by muriatic acid ; nitrate of bary tes threw 

 down a copious white powder insoluble in nitric acid ; lime- wa- 

 ter occasioned a white flocculent precipitate, while infusion of 

 nut-galls and acetate of lead threw down copious coloured pre- 

 cipitates. When incinerated, it left a good deal of sulphate of 

 soda and phosphate of soda, with some phosphates of lime and 

 magnesia. The following were the substances extracted from 

 the liquor of the allantois of a calf by Lassaigne : 



Albumen. Sal-ammoniac. 



Osmazome. Common salt. 



Mucus. Much sulphate of soda. 



Allantoin. Phosphate of soda. 



Lactic acid and lactate of Phosphates of lime and mag- 

 soda, nesia. 



Lassaigne also examined the liquor of the allantois of a mare, 

 but could detect in it no allantoin. The following were the sub- 

 stances which he obtained from it : 



Mucus. Common salt. 



Albumen. Chloride of potassium. 



Osmazome. Much sulphate of potash. 



Lactic acid. Phosphates of lime and magnesia. 



M. Lassaigne had already, in 1819, examined the soft white 

 viscid matter found in the liquor of the allantois of a calf, especi- 

 ally towards the period of gestation, and known to veterinary 

 surgeons by the name of hippumanes.* 



Cold water extracted from it only a little albumen and com- 

 mon salt. Alcohol and ether were incapable of dissolving any 

 part of it. When heated in caustic potash, it dissolved, with the 

 exception of a white crystalline powder, which constituted 27 

 per cent, of the original matter. The matter dissolved by the 

 potash being thrown down by an acid possessed the characters of 

 mucus. The white powder was oxalate of lime. 



* Ann. de Chim. et de Phys. x. 200. 



