18 



BOILEE TESTS. 



that the preliminary heating is required for none but the first 

 test. To compute the percentage of moisture, the weight of 

 cold water drawn in is multiplied by the number of degrees 

 difference between the two temperatures observed, and the 

 product is divided by the weight of condensed steam. To the 



THE SUPERHEATING CALORIMETER. 



quotient is added the temperature of the heated water, and the 

 sum thus found is subtracted from the total heat of saturated 

 steam of the observed pressure (reckoned from zero). The 

 remainder, divided by the latent heat of the same steam, gives 

 the proportion of moisture. 



