-Calorimetric Investigatiojis. 





E.ptl. 



Expt. 2. 



Weight of the water, - - 



G 



0-8333 



0-3333 



Weight of the glass case, - 



Gg 



0-2223 



0-2223 



Weight of the platinum load, 



Gp 



0-5230 





Temperature communicated, 





99°-474C. 



99°-474C. 



Duration of the experiment, - 



M -M„ 



76' 



86' 



Movements on the scale before the 









experiment, - 









Movements on the scale after the 





.. 





expenment, 







Observed divisions on the scale, 



Q„-Q, 573-9 



568-1 



Constants, 



W,=0-4692 ; W^ 



=2-870 



The ealculation gives: from experiment 1 : W^= 14-660 

 2:W«,=14-654 

 in the mean W«,= 14-657 



For the explanation of the method already described, I ap- 

 pend the results of several determinations conducted on chemi- 

 cally pure substances, whose specific heat has been determined 

 with great accuracy by the previously customary method of 

 mixture. The elements of observation in these experiments 

 are to be found arranged in the following table 4, whose letter- 

 ing relates to equations (5) and (7). 







Table 



4. 









Substance investigated, j 



Castsuver. 



Cast Zinc. 



-^sr 





„as. 



^eigljt of the substance 

 Jeight of the glass case, 



Movements on scale be- 

 fore the experiment, 

 tj'^'^/^^t^?^ scale after 



^tiononthe'soale. 



Gp 

 Mj-Mo 



Qo^'-Qi 



ioo°-ooc. 



297-7 



343-8 



3-8575 

 99°-80C. 



1-8675 



99..80C. 



1 00-00 c. 



^om'^,^ . - 







W=l 



4-657 







In the following table 5 are to be found the specific heats 

 computed from these values to^rether with the ones found by 

 ^eguault by the method of mixture. 



