On the application of Sprengel’s Mercurial Pump. 879 
sists of thick vulcanized rubber covered on the outside with a 
g 
taken to keep the column of metallic copper at a full red heat, 
and to proceed slowly. When the combustion 1s finished, the 
pump is again set in operation until a perfect vacuum is ob 
tamed. The receiver wih I employ for collecting — gas, is 
i erwa 
0°1380 er. crystallized asparagin gave 21°98 c.c. nitrogen (moist) at 
13°-75 Bee z ps alae ors per cent. The formula requires 18°66 
per cent. J ve 
0°2910 or. sodic stryphnate gave 125°86 c.c, nitrogen at 18°C. and 
559™™— 36-98 per cent. nitrogen. The formula Na(€,H 2H,02) 
+H, © requires 36-26 per cent. : oo ; 
0°8593 “or. pease sh an gave 115c¢.c, nitrogen at 6°25 C, and 
762-7™™ —16°50 per cent. The formula K€,H,N,0, requires 
16°47 per cent. 
0°6730 gr. allantoin gave 189 c.c. nitrogen at —1°C. ant oe 
5°40 per cent. The formula €,H,N,0; requires 35°40 per 
cent. 
jum 
