Tables 292, 293. -DIELECTRIC CONSTANTS {continwd). 283 



TABLE 292. — Standard Solutions for the Calibration ol Apparatus for the Measuring of Dlelectrlo Constants. 



Turner. 



Substance. 



Benzol . . . 



Meta-xylol . 

 Ethyl ether . 

 Aniline . . 

 Ethyl chloride 

 O-nitro toluol 

 Nitrobenzol . 

 Water (conduct, 



io-«) 



Diel. const. 



at iS""". 

 A= 00. 



2.288 

 2.376 



4-36^ 



7.298 



10.90 

 27.71 



3645 

 81.07 



Drude. 



Acetone in benzol at 19°. A = 75 cm. 



Per cent 

 by weight. 



O 

 20 

 40 

 60 

 80 

 100 



Density 16°. 



0.885 



0.866 

 0.847 

 0.830 

 0.813 

 0.797 



Dielectric 

 constant. 



2.26 

 5.10 



8.43 

 I2.I 

 16.2 



20.5 



Temp. 

 coeflScient. 



0.1% 



0-3 

 0.4 



0-5 

 0.5 

 0.6 



Water in acetone at 19°. A = 75 era. 



O 

 20 

 40 

 60 

 80 

 100 



0.797 

 0.856 

 0.903 

 0.940 



0-973 

 0.999 



20.5 

 31-5 



43-5 

 57 -o 

 70.6 

 80.9 



0.6% 



0.5 



0.5 



0.5 



o. 



0.4 



Nemst. 



Ethyl alcohol in 



water at 19.5°. 



A= 00. 



Per cent 

 by weight. 



90 

 80 

 70 

 60 



Dielectric 

 constant. 



26.0 

 29-3 



33- S 

 38.0 



43-1 



References on p. 284. 



* For the effect of temperature, see Gray-Dobbie, Pr. Roy. Soc. 63, 18 

 " " " " wave-length, lee K. F. Lowe, Wied. Ann. 66, 1898. 



Smithsonian Tables. 



67, 1900. 



