242 COMPOSITION AND PRODUCTS OF 



In 100 parts. 



Atoms. Atomic weight. Calculated. Found. 



32 Carbon 194.18 85.85 85.04 



32 Hydrogen 32.00 14.15 14.12 



226.18 100.00 99.16 



The solution which had been treated with ether was now 

 perfectly transparent, and contained potash in combination 

 with the acid products resulting from the distillation. To this 

 was added a solution of chloride of calcium, by which means 

 an insoluble compound of the acids and lime was formed, and 

 this, being decomposed by hydrochloric acid, furnished the' 

 acids for examination. 



Although it was evident from what had been before done 

 that no oleic acid could be present, yet to prevent any doubt I 

 made a direct examination for this acid by digesting a portion 

 of the acid mass with water and oxide of lead, and then treat- 

 ing the lead-salt thus formed with ether, which dissolved no 

 portion of it. The portion of the acid product not digested 

 with the oxide of lead was found to consist of a solid acid, 

 mixed with a very small quantity of a fluid one, which I con- 

 sidered to be the same that has been before mentioned, as a 

 probable impurity of spermaceti, and for the same reasons then 

 stated it was impossible to make any examination of it. 



The solid acid, which was obtained pure by repeated crys- 

 tallization out of alcohol, exhibited the same physical proper- 

 ties, as well as chemical composition, as the acid obtained from 

 the saponification of spermaceti, and which has been shown to 

 be athalic acid. 



0.2715 of the acid gave 0.739 gramme carbonic acid and 

 0.306 gramme water, making in one hundred parts 



Hydrated athalic acid. 



Carbon 75.00 75.21 



Hydrogen 12.52 12.39 



Oxygen 12.48 12.40 



100.00 100.00 



0.8625 gramme of the silver-salt, when burnt, gave 0.254 

 gramme silver, which indicates in one hundred parts 29.44 

 silver, 31.61 oxide of silver, and an atomic weight of 250. 



0.481 gramme of the silver-salt burnt with the oxide of 

 copper gave 0.932 gramme carbonic acid and 0.368 gramme 



