72 ELECTROLYSIS. 



volt, which is certainly exaggerated, the work obtained will be 

 found inferior to 1 kilogrammetre. The heat generated by 

 1 cubic metre of gas would develop, through the intermediary 

 of a Clamond battery, a maximum power of 5 kilogrammetres, 

 whereas the same quantity of gas consumed in an improved 

 " Otto " gas engine develops over 75 kilogrammetres. 



