298 



On the Rapid Production of Steam. 



THIRD SERIES, 



With cylinders of cast iron of different weights, and at different tem- 

 peratures ; water at 212°. The surface exposed in each experi- 

 ment, is indicated in a separate cohimn. 



It appears from the preceding table, that the least amount of steam 

 given by any of the experiments, was that of No. 1 . where, under 

 the head of decimal parts, we find 3f per cent. ; and the greatest 

 amount was that of No. 34, where the same column exhibits 22 /^^^ 

 per cent. In the latter case, 4:^*-^^ lbs. of metal gave a pound of 

 steam, while in the former, 26§ lbs. were required for that purpose. 



