• 1821.1 New Scientific Books. 237 



Potassium. . . . 40-15 .... 1 atom .... 97983 



Azote .... 14*53 2 atoms 354-52^ 



Carbon'. 12-35.... 4 atoms' ... . 30132 V 1460-48 



Sulphur 3297 .... 4 atoms 804-64? J 



100 00 2440-31 



The sulphuretted hydrocyanic acid is composed of 



Hydrogen 1*68 2 atoms 12-44 



Nitrogen 23-85 1 atom 17726 



Carbon 2030 2 atoms 150-66 



Sulphur 54-17 2 atoms 402-32 



100-00 772-68 



In considering the nature of these substances, M. Berzelius seems 

 inclined to admit that view of them and their nature which is analogous 

 to the chlorine theory, as also this theory itself, and goes a considera- 

 ble way towards answering some of those objections which have been 

 raised at different times to it. 



On substituting selenium for sulphur in these and analogous experi- 

 ments, results which might have been expected from the analogy of 

 the two bodies, took place. On heating it with the ferroprussiate of 

 potash, a seleniocyanuret of potash was formed perfectly analogous to 

 the sulphocyanuret.— (Ann. de Chim. xvi. 23.) 



Article XVII. 



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