Manchester Memoirs, Vo/. Iviii. {igi^), No. \i^. J 



The following considerations may serve as a pioneer 

 attempt in this direction. 



The calorimetric measurements of the heat of complete 

 combustion of carbon per gram-atom give the following 

 numbers (Nernst) : — 



Amorphous carbon ... 97650 cals. 

 Graphite .. ... 94-8 10 „ 



Diamond ... ... 94"3io „ 



mmu (LASS. 



Fig. S- 



These calorimetric measurements indicate the sum- 

 total of the energy liberated during the formation and 

 degradation of the complexes, plus that of the oxidation 

 of CO to CO,. 



The whole process can be represented in the following 



manner : — 



I. II. III. 



2c,+/0,-^2c,p;->aC0 + /3co,-^(a + /j)C02. 



