M. E. Wiedemann on the Specific Heats of Gaset 

 Table II {continued). 



105 





7. 



8~ 



9. 



10. 



11. 



w 



60-74 

 6-81 

 750-3 

 45-3 

 24-4 



3-14 

 24-4 

 23-07 



0-26 

 32-01 



0-13 



0242 



0-0145 



7-64 



722 

 27-6 

 201-0 

 173-4 



0-5448 



60-96 



7*02 

 745-8 

 51-4 

 25-6 



2£ 



2-81 

 26-0 

 23-35 



0-25 

 33-15 



0-135 



022 



0-012 



7-95 



7-48 

 28-55 

 202-3 

 173-75 



0-5493 



6101 



8-15 

 745-8 

 48-9 

 26-0 



3 



2-72 

 26-6 

 22-55 



0-30 

 32-65 



0-15 



0-242 



0-0148 



8-94 



8-27 

 27-8 

 199-9 

 172-1 



0-5322 



60-18 



8-3 



747-7 



45-9 



24-8 



2-61 

 24-5 

 21-14 



0-35 

 32-0 



016 



0-29 



0-0174 



9-22 



8-40 

 26-6 

 196-9 

 170-3 



0-5270 



60-91 



6-6 



747-7 



44-0 



25-0 



2* 



2-604 

 25 

 21-25 



0-35 

 30-44 



0-17 



0-277 



0-0196 



713 



6-50 



2622 



192-65 



166-43 



0-5323 



a- 



B 



» 



v 



n 



a 



r 



T 



m 



T x 



m, 



k l 





9 



0j 



t 



M 



e 



c 





The mean value is 05356 ; greatest deviation 0*0137. 



Regnault's number for the specific heat of ammonia between 

 200° and 20°, viz. 0*50836, is, as he himself supposed, rather 

 too small ; according to my researches it should be 0*5356. 



The true specific heats are deduced as follows : — 



For 0° . . . . . 0*5009 



100 0*5387 



200 0*5629 



Multiplying the numbers by 0*5894 (the specific gravity of 

 ammonia), we obtain the relative heats : — 



For 0*2952 



100 0*3134 



200 0*3378 



The specific heat of ammonia increases therefore with in- 

 crease of temperature, although not in so marked a manner as 

 in the cases of nitrous oxide, carbonic acid, and ethylene. 



Conclusion. 



A comparison of the results obtained by the method described 

 above with those obtained by Regnault, shows that my results 

 are in no respect less exact than his. But inasmuch as the 

 quantity of water in my calorimeter was but the tenth part of 

 that used by Regnault, it was only necessary to employ one 

 tenth of the quantity of gas in order to attain as great an in- 



