Ill 



cierable. DE Z'ONDI has, however, lately shown, 

 that these differences relate, properly speaking, 

 only to the urine of the foetus, which is contained 

 in the allantoid membrane. YATJCITJELIN and 

 BUNIVA, who examined these mixed humours, 

 found in them a peculiar cristallizable acid, 

 scarcely soluble, which they called amnic acid. 

 It greatly resembles the benzoic acid, but differs 

 from it in this respect, that it is destroyed both 

 by distillation and by the nitric acid. They also 

 found in it a peculiar brown substance, resem- 

 bling an extract, which is soluble in alcohol, 

 cannot be precipitated by tanning, and which, 

 consequently, is unlike other animal matters of 

 the same kind- Meconium has only been ex- 

 amined by BAYEN, and seems to be a biliary mat- 

 ter, converted into resin, the properties of which 

 the more resemble the bilious matter in the intes- 

 tines of full-grown persons, the further it has ad- 

 vance from the gall-bladder of the foetus towards 

 the rectum. 



The Milk was first examined by BOYLE; 

 after him, BOERHAAVE gave an explicit analysis 

 of it. HOFFMAN, MACCIUER, and SPIELMAN, 

 followed; and lastly, ROUEIXE and SCHEELE 

 investigated the salts and other less-known con- 



