RATIO OF SPECIFIC HF^ATS. 



23 



served t\m purposes of ineasiu'eineiit as in t]n; [>u-ci-<\\wj i-\|"-iiiiii'iils. '|'Ii<- n--,ist- 

 aiice at Z was at the initial temperature : 



IV. = 70 + lo + .2* + 5 4- .2 + I ; 

 and at tlie final teni|ieraturt', : 



IV, = 70 + 10 + .2* + 2.*+ .5. 

 In tlie case of hydrogen tlie [it-rioil of efflux for corresponding ai)ertures is much 

 smaller than for the other i^ases. 



EFFLUX TIME ij """; APRIL 26, 1894. 



I■f._•^-..r^■ 



+ 

 + 



+ 

 + 



Bridge. 



601 

 601 



599 

 601 

 601 

 605 

 603 

 604 



I'emperaturc. 



16.01° C. 



16.01 



'5-99 

 16. oi 

 16.01 

 16,02 

 r6.oi 

 16.02 



Manometer. 



Pressure. 



5f-54 

 51.20 



5 '-65 



Bridge. 



604 

 604 

 603 



1 emperature. 



16.01 

 16.02 

 16.01 



In spite of the shortness of the efflux time (\ second), the galvanometer needle 

 at the pi-essiire of 51.54 remained quite at rest for two (2) seconds. In the follow- 

 ing series of experiments all quantities except the position of the sliding contact 

 on the bridge and the initial tem[)ei-ature are exactly the same as in the preceding 

 series; but we operated with a larger efflux opening. 



EFFI-UX time!'"-; APRIL 28, 1894. 



In the following experiments for a smaller piv.ssure excess, the change of 

 resistance amounted to 3.1 ohm. The largest efflux opening was made use of. 



