382 Profs. Fleming and Dewar. Dielectric Constants 



II. Dielectric, Constant of Normal Sodic Carbonate (Na 2 C0 3 ). 



(6 per cent, (cryohydrate) solution.) 



Corrected galvanometer deflection when the condenser had air as 

 dielectric = 4'24 cm. for 100 volts. 





Mean 





Temperature 



galvanometer 





in platinum 



rl pflppf inn 



\)i p 1 ppf T*l f* 



degrees. 



in centimetres. 



constant. Observations. 



-198-5 



2-10 



34*4 Condenser charged to 1*434 volts, 



— 192-2 



2-35 



38-4 



-171-0 



2-55 



41-7 



-159-0 



2-60 



4s% 7 



-144-2 



2-82 



46-2 



-134-8 



3-40 



55-7 



-122-0 



4-70 



77-0 



-114-3 



5-50 



90-2 



-104-0 



7-15 



118-0 



-94-0 



8-90 



146-0 



N.B. The condenser was 



warmed up in the vacuum tube. 



III. 



Dielectric Constant of Sodic Bicarbonate (NaHC0 3 ). 





(6 per cent, solution.) 



Corrected galvanometer deflection when the condenser had air as 





dielectric 



= 4-34 cm. for 100 volts. 





Mean 





Temperature 



galvanometer 





. in platinum 



deflection 



Dielectric 



degrees. 



in centimetres. 



constant. Observations. 



-195-3 



12-20 



2* 74 Condenser charged to 99*0 volts. 



-183-3 



3-70 



4*24 Condenser charged to 19*8 volts. 



-166-7 



3-00 



48-70 



-1130 



4-40 



70'70 Condenser charged to T434 volts. 



-90-5 



4-65 



74-70 



N.B. — The condenser was warmed up out of the vacuum tube. 



