the Elements Carbon, Boron, and Silicon. 



177 



N = the number of divisions indicating the displacement of 

 the mercury thread when one heat-unit was developed 

 in the calorimeter ; 

 W=the number of heat-units, calculated from N and N , 

 developed by the bringing of G grms. of the substance, 

 heated to the temperature T, into the calorimeter ; 



C _T=the average specific heat between the temperature 0° 

 and T, deduced from W, T, and G, 



and 



W T =the amount of heat required to raise a unit- weight of the 

 substance from T to T. 



a. Experiments within the Temperatures —80° to 280°, carried 

 out by means of the Ice~calorimeter. 



First Series. 



N = 14-42. 



G. 



T. 



N. 



W. 



Co-T. 



3-562 

 3-562 

 3-562 



-79-8 

 -79-9 

 -79-4 



298-3 

 295-4 

 289-9 



20-69 

 20-49 

 2011 



00728 

 00720 

 0711 



3562 



-79-7 



294-5 



20-43 



00720 



<° 79 .7=5736. 





Second Seri 

 N = 14-42 



es. 





3562 

 3-562 

 3-562 



-21-35 

 -2110 

 -21-30 



103-9 

 1040 

 1040 



-721 

 -7-21 

 -7-21 



00948 

 00960 

 00951 



3-562 



-2125 



1040 



-7-21 



00953 



W -21-2 = 2 - 024 - 





Third Series 

 N = 14-42 



3. 





3-562 

 3-562 

 3-562 



2120 

 21-42 

 21-60 



123-3 

 1241 

 1247 



8-55 

 8-61 

 8-65 



01132 

 01128 

 01125 



3-562 



21-41 



1240 



8-60 



01128 





C = 2-4 



14. 





Phil. Mag. S. 4. Vol. 49. No. 324. March 1875. 



N 



