82 B. W. Bull on Emulsine and its Composition. 



liquid, crystals were observed which were separated from the 

 fluid, washed out with cold water and redissolved with the inten- 

 tion of recrystallizing. A number of attempts, while operating 

 on the amount obtained from small quantities of almonds, did not 

 succeed, but on evaporating the residue from a large amount, sev- 

 eral crops of quadrangular prismatic crystals were observed, which 

 were treated with cold water in which they were not easily solu- 

 ble, afterwards with alcohol which removed a large amount of the 

 coloring matter, and then recrystallized. This was a magnesia 

 salt, and by treatment with animal charcoal and recrystallization 

 did not become sufficiently pure for analysis. It was transformed 

 into a lime salt, by treatment with milk of lime which threw 

 down all the coloring matter with the magnesia. The excess of 

 lime was neutralized by sulphuric acid and the sulphate of lime 

 removed by concentrating the solution and redissolving in alcohol. 

 From the alcoholic solution white acicular crystals, radiating in 

 star shaped groups, were obtained in abundance. 



The following analysis shows that the original crystals were 

 lactate of magnesia, and that the substance analyzed was the 

 corresponding lime salt. I. -6252 grammes gave with oxyd of 

 copper -7415 grm. carbonic acid and -269 grm. water. 



II. -569 grm. ignited with sulphuric acid, gave -345 grm. sul- 

 phate of lime giving the following composition. 



Found. Calculated. 



C 32-34 33-03 



H 



4-78 4-59 



O 37-93 3669 



CaO - 24-95 25-69 



10000 10000 



Corresponding to the formula C. H, O. CaO. 



The precipitate produced by acetic acid was examined and pre- 

 pared for analysis, by washing with water and subsequent boiling 

 with alcohol and ether to free it from the accompanying oil. In 

 this state it is a fine light powder of a reddish tint, soluble in 

 alkalies, and in warm concentrated solutions decomposed with ev- 

 olution of ammonia, insoluble in dilute and partly soluble in con- 

 centrated acetic acid and not precipitated from its alkaline solu- 

 tions by alcohol. It contains nitrogen and sulphur, burns with a 

 smoking flame, and leaves a trifling amount of ash with a neutral 

 reaction. Strong hydrochloric acid dissolves it, forming a fine 

 red liquid, which after a day or two turns to a dark purple. In 

 sulphuric acid, it gelatinizes and turns through red to black with 

 evolution of sulphurous acid. 



I. -274 grm. substance containing 159 per cent, ash, equal to 

 •2697 grm. organic matter, gave with chromate of lead -5045 grm- 

 carbonic acid and -167 grm. water. 



