Mechanical Equivalent of Heat. | 55 



It has also beeii shewn that the heat losses take place mainly from 

 'the tubes which lead the water into the flask and not fiom the flask 

 itself. For a tixed rate of generating heat the loss of heat is 

 proportional to the excess of the mean of the inlet and outlet water 

 temperatures over the air temperature. The rate of loss of heat varies 

 with the rate of generation of heat for flxed temperatures and iias 

 (^een shewn to be a linear function of it. This will enable the heat 

 Josses to be allowed for. J.K.R. I 



