^f 8 Table 435 {continued). 



DIELECTRIC CONSTANTS OF LIQUIDS. 



A wave-length greater than loooo centimeters is desiguated by oo , 



Substance. 



Aniline . . . 

 Benzol (benzene) 



Bromine . . . 



Carbon bisulphide 

 (t >< 



Chloroform , 



Decane . 

 Decylene 

 Ethyl ether 



Formic acid 



Glycerine 



Hexane . , 

 Hydrogen perox- 

 ide 46 % in H2O 



Substance, 



Nitrobenzol 



Octane 



Oils: 

 Almond 

 Castor . 

 Colza . 

 Cottonseed 

 Lemon . 

 Linseed 

 Neatsfoot 

 Olive . 

 Peanut . 

 Petroleum 

 Petroleum 

 Rape seed 

 Sesame 

 Sperm . 

 Turpentine 

 Vaseline 



Phenol 



Toluene 



Meta-xylene 



ether 



Temp. 

 °C. 



Water . . . 

 for temp, coeff. 

 see Table 344. 



(frozen) 

 — 10 



—5 

 o 



+ 15 

 30 

 18 



17 

 17 



20 

 II 

 20 



14 

 21 



13 



20 

 11.4 



20 

 16 



134 

 20 

 20 



-83 

 + 16 



19 



18 



17 



18 

 17 

 17 

 17 



Wave- 

 length 

 cm. 



7i 



73 



00 



73 



00 



7i 



200 

 74 

 38 



Diel. 

 const. 



9.9 



42.0 

 41.0 



37.8 



35-1 

 3645 

 34-0 

 1.949 



2.83 

 4.67 



311 



3.10 

 2.25 



3-35 

 3.02 



311 

 303 

 2-'3 

 1.92 



2.85 

 3.02 



3-17 



2.23 



2.17 



9.68 



2-51 



2-33 



2.31 



2.376 



2-37 



81.07 

 80.6 

 81.7 

 83.6 



1 Abegg-Seitz, 1899. 



2 Drude, 1896. 



3 Marx, 1898. 



4 Lampa, 1896. 



5 Abegg, 1897. 



6 Thwing, 1894. 



7 Drude, 1898. 



8 Francke, 1893. 



9 Lowe, 1898. 



10 Landolt-Jahn, X892. 



11 Turner, 1900. 



12 Schlundt. 



13 Tangl, 1903. 



14 Coolidge, 1899. 



15 V. Lang, 1896. 



16 Nernst, 1894. 



17 Calvert, 1900. 



18 Hasenohrl, 1896. 



19 Arons-Rubens, i8( 



20 Hopkinson, 1881. 



21 Salvioni, 1888. 



22 Tomaszewski, 188 



23 Heinke, 1896. 



24 Marx. 



25 Fuchs. 



Addenda to Table 440, p. 361, Dielectric Constant of Rochelle Salt : 

 The polarization of the Rochelle salt dielectric in an electric field is somewhat analagous to the behavior of the mag- 

 netization of iron in a magnetic field, showing both saturation and hysteresis. The dielectric constant D depends on 

 the mitial and final fields and the hysteresis. 



Initial field, 765 v/cm.; Final field, 690 v/cm.; Average D (23° C), 40 



765 -153 205 



765 -765 »57 



o 880 86 



The last value may be fair value for ordinary purposes. The electrodes were tinfoil attached with shellac. The field 



was applied perpendicular to the a axis. Like piezoelectric properties, the dielectric constant varies with difierent 



crystals. It depends on the temperature as follows ; (field o to 8S0 v/cm) 



-7o°C, D= 12; -40° 

 (Data from Valesek, University of Minnesota, 192 1.) 

 Smithsonian Tables. 



1) 

 M ; -20° 48; 0°, 174 ; +ao°, 88; -i-3o°, 5»- 



