B. W. Bull on Emulsine and its Composition. 79 



to 59*11 do., consisting of phosphate of magnesia with a small 

 amount of lime. The accompanying organic matter contains 

 nitrogen, but no sulphur could be detected by treatment with 

 caustic potassa and lead salts. 



It is quite apparent that this is not a coagulation but rather a 

 decomposition, and that emulsine does not possess the property of 

 being coagulated heretofore ascribed to it. The filtrate contains 

 a product of this decomposition which is precipitated by strong 

 alcohol in the form of a white granular substance, amounting to 

 nearly thirty per cent, of the original quantity, and which, when 

 dried, after washing with alcohol and ether, remains in white 

 opaque masses, somewhat tenacious and quite difficult to pulver- 

 ize. It contains a large amount of earthy phosphates varying in 

 different samples from eighteen to thirty-five per cent. From the 

 following analyses it appears to differ materially from emulsine in 

 its amount of nitrogen, which is in proportion to the carbon as 

 1 to 12. 



I. '4875 grm. substance containing 81*15 per cent, organic mat- 

 ter, corresponding to '3956 grin., gave with chromate of lead, car- 

 bonic acid -6265 grm., water -244 grm. 



II. -4045 grm., as above, corresponding to *3282 grm., gave 



with chromate of lead *519 grm. carbonic acid, and -199 grm. 

 water. 



III. 423 grm. containing 64*93 per cent, organic substance, 

 corresponding to *2747 grm., gave with chromate of lead -4285 

 grm. carbonic acid, and -1737 grm. water. 



IV. -4183 grm. as above, corresponding to -2718 grm., gave 

 with soda lime -3735 grm. chlorid of platinum and ammonium. 



V. -412 grm. as above, equal to -2675 organic matter, gave 

 with soda lime -3555 chlorid of platinum and ammonium, from 

 which the following are calculated, 



C - - 4317 4341 42 IS 



H - - 6*85 673 702 



N - 8*62 8*34 8-48 mean 



O + S - 41-36 4182 4202 



100*00 10000 10000 



Neither of the above bodies possesses any power of decomposing 

 amygdaline. This latter is decomposed by acetate of lead into a 

 body containing sulphur and one free from it. The moist pre- 

 cipitate by alcohol was redissolved in water, leaving a small insol- 

 uble residue behind. To the solution was added neutral acetate 

 of lead as long as a precipitate was produced. This precipitate 

 was washed out with distilled water and decomposed by passing 

 a stream of suiphureted hydrogen through it while suspended 

 *n water. The excess of suiphureted hydrogren was removed 



