306 Of the P}^opcigation of Heat 



used for diminishing the effects produced by those mo- 

 tions had been very efficacious. 



As the results of the three experiments No. 34, No. 

 i^c^^ and No. ^^^ were exceedingly regular and satisfac- 

 tory, — as the Heat of the water appears to have been 

 so completely confined by the warm covering which sur- 

 rounded the jar, and as the process of melting the ice 

 went on regularly or equally for so great a length of time 

 (three hours) in the 36th experiment, we may venture to 

 conclude that more ice could not possibly have been 

 melted by boiling-hot water — standing on it — than was 

 melted in these experiments. 



This quantity was found to be at the rate of 654I- 

 grains in 30 minutes. 



But as in these experiments extraordinary means were 

 used, by which an uncommonly large quantity of ice was 

 melted, they cannot be considered as similar to those 

 which were made with cold water, and consequently can- 

 not with propriety be compared with them. 



When the experiments were similar, the mean results 

 of those which were made with water at different temper- 

 atures were as follows. 



