THOMPSON AND LOMBARD. — NITROGEN IN CALCIUM CYANAMIDE. 257 



The pressure had become constant. Some nitrogen was therefore 

 pumped out to get the equilibrium from the other side. 



Current in 

 Time. Kilowatts. Pressure. Wanner Temperature. 



Pyrometer. 



10.03 P. M. 5.69 102.2 

 12.30 " 5.71 104.2 



The reaction went so slowly that it did not seem possible to get an 

 equilibrium from this side at this temperature. The temperature was 

 therefore raised. 



1.00 p.m. 6.32 116.9 5.88 1199 



2.00 " 6.31 142.0 



The pressure was increasing rapidly, and in order not to use up all 

 the calcium cyanamide, some nitrogen was admitted. 



2.05 p. m. 6.27 160.0 

 2.30 " 6.30 160.4 



Since the pressure remained constant, more nitrogen was admitted. 



2.45 P. M. 6.30 189.7 



3.00 " 6.31 181.0 5.87 1194 



4.00 " 6.27 171.1 5.86 1193 



4.45 " . . 168.1 5.90 1193 



June 24. 8.30 a. m. 6.33 166.5 



10.00 " 6.34 166.5 



This value, 166.5 millimeters, seems to be the equilibrium. In order 

 to get it from the other side some nitrogen was pumped out. 



The pressure increased to only 160 millimeters in place of 166. In 

 order to see which was nearer the correct value, nitrogen was admitted. 



1199 



