Calorimetric Thermometers. 335 



The following experiments are complementary to the pre- 

 ceding ones and illustrate the same fact. 



B. Experiments in which a rate of cooling was measured. 



I. 



Eate. 



Time. 



Reading. 







o 



55 



Cold water added, 





3 min. 



22-16 



6 „ 



21-76 



9 V 



21-41 



12 „ 



20-99 



15 „ 



20-59 



Time. 



Reading. 







o 



53 



Cold water added 





3 min. 



22-21 



6 „ 



21-84 



9 „ 



21-48 



12 „ 



21-155 



15 „ 



20-815 



II. 



•41 

 •34 

 •42 

 •40 



Rate. 



I 



mean 



'39. 



•37 

 •37 

 •325 

 •34 



} 



mean *342. 



The difference between the rate of cooling measured during 

 the first interval and that during the remaining ones being 

 + '02 in the one experiment, and + *028 in the other, i. e. 

 practically nil. 



III. 



Time. 





 Hot water added. 

 2 min. 

 5 



8 

 11 

 14 



Time. 





 Hot water added 



1 min. 



4 „ 



7 „ 

 10 „ 

 13 „ 



Reading. 







20-65 

 20-45 

 20-09 

 19-79 

 19-42 



Reading. 



o 



-3 



25-58 



25-36 



24-9.35 



24-52 



24-16 



Rate. 



IV. 



•20 

 •36 

 •30 

 •37 



Rate. 



} 



mean 



'34. 



•22 



•425 \ 



•415 Vmean 

 •36 J 



'40. 



