3Q8 COMPOUND PRODUCTS. HAP. I. 



of the Papaw-tree, a plant indigenous to India and 

 the Isle of France. 



Properties. A specimen of this juice, which often exudes 

 from the tree in a viscid and milky state, was 

 brought to Paris by Charpentier, after being eva- 

 porated to dryness, and presented to Vauquelin. It 

 was somewhat yellowish and semi-transparent; and 

 its taste was sweetish ; but it had no smell. When 

 it was subjected to maceration in cold water, the 

 greater part of it was dissolved. The solution 

 frothed with soap, and was coagulated and rendered 

 white by the addition of nitric acid. When boiled 

 it precipitated white flakes, which were coagulated 

 albumen possessing all the properties by which it 

 is distinguished in animals, disengaging ammonia 

 by burning, and yielding at the same time carbonic 

 acid and water. And hence its relation to animal 

 gluten is established, and the elements of its com- 



Gomposi- position ascertained ; which, according to the ana- 

 lysis of Messrs. Gay Lussac and Thenard, are 

 carbon, oxygene, hydrogene, and nitrogene, in the 

 following proportions : 



Carbon .. 52*883 



Oxygene 23'872 



Hydrogene 7 '540 



Nitrogene 15705 



Total 100- 

 Albumen has not been found in such abundance 



