486 



Mr. L. C. Jackson on the Dielectric Constants 



Experimental Results. 



The results obtained for the dielectric constants of esters 

 at the temperature of liquid air are exhibited in tabular 

 form below, The values have been corrected for the in- 

 equalities of the condenser scale and for the temperature 

 change of the dimensions of the experimental condenser. 



Table I. 









Dielectric Constant 



Dielectric Constant 



Substance. 



Temperatur 



eT. 



at temperature T. 



at ordinary 





Obs. Mean. 



Obs. Mean. 



temperature. 





76°-8 A 





254 





Methyl 



78-°0 A 



78° • 



65 A 



2-57 



2-56 



8-87 



formate. 



82°-8 A 





2-52 







77°-0 A 





2-615 







83°-2 A 





2-38 





Ethyl 



82°-0 A 



81°' 



3 A 



2-51 



2-40 



- 8-27 



formate. 



82°-8 A 

 77° -3 A 





2-48 

 2-22 







81°-0 A 





2-36 





n-Propyl 



77°'0 A 



79 c 



•5 A 



2-40 



2-39 



7-72 



formate. 



82°-6A 





244 







77°-3 A 





2-36 







82°-0 A 





245 





n-Butyl 

 formate. 



770-0 A 78 o 



•7 A 



2-42 . 2-43 



— 





77°-0 A 





2-42 







77°'3 A 





2-63 







76°-6 A 





2-63 





Methyl 

 acetate. 



79°-0 A 77° 



77°'0A 

 78°-0 A 



•3 A 



2-60 2-58 

 2-53 



2-53 



7-03 



Ethyl 



81°-0 A 



79 c 



15 A 



2-45 



2-48 



5-85 



acetate. 



77°-3 A 





2-515 







82°-8 A 





2-41 





n-Propyl 



82° -8 A 



80° 



•9 A 



2-49 



242 



5-65 



acetate. 



77°-0 A 





244 







81°-0 A 



•6 A 



2-34 





n-Butyl 



• 76°-8A _ o 



770 



2-38 



2-41 



5-00 



acetate. 



7S°-4 A 





2-44 





