422 Mr. H. Davies on some Applications of the 



The calculations for the tables below were based on the 

 experimental results given in Landolt and Bornstein. The 

 coefficients of expansion were calculated for 15° C. Where 

 experimental values were not given they were calculated 



from a = ■— -, — ^ for T = 288. The table gives the values of 

 7T, <j), and — - ; it is in atmospheres, <\> in c.c. per gram. 



molecule. 



dT 



Table IV. 



Liquid. 



7T. 



0. 



It' 



Acetone 



1268 



778-9 

 1328 



863-2 

 1348 

 1176 

 1102 

 1027 

 1076 



661 



838-5 

 1082 



935 



677 

 1127 

 1683 

 1188 



649 



845 



18-54 



39-1 



17-8 



34-43 



176 



19-2 



21-45 



2297 



21-96 



35-8 



28-15 



21-8 



318 



28-7 



21 



13-95 



25^05 



40-7 



27-96 



-1-74 

 -1-25 

 -217 



- -91 

 -1-81 

 -111 



- 1-31 

 -1-05 

 -1-3 



- -65 

 -1-2 

 -21 



- -783 

 -1-04 

 -1-43 

 -2-08 

 -1-036 



- -83 



- -87 



Ether 



Ethy lamine 



Ethyl benzene 



Ethyl alcohol 



Aniline 



Benzene 



Mono. chor. benzene 



Carbon tetrachloride 



Cymene 



Dietbylainine 



Methyl ether 



Naphtha lin 



Pentane 



Propyl alcohol 



Carbon bisulphide 



Tolu ene 



Tri-ethylam ine 



Xylene-o 





A discussion of the various methods which have been 

 proposed for the calculation of it has been published by 

 Dr. Lewis *. The on\j methods to which reference need be 

 made here are to those of Benedicks f, Traube t, and Lewis *. 



Benedicks calculates it from a relation it — — which he 



VOL 



obtains from Yan der Waal's equation. This is very similar to 

 (13) above. The values of it obtained from this relation will 

 be very much the same as from (13), since in liquids " v " 



and 



">"("*) 



are of the same order of mao-mtude. 



* Phil. Mag. July 1911, pp. 193-197. 



f Zeit.fiir anorg. chem. xlvii. p. 455 (1905). 



\ Ibid, xxxiv. p. 416 (1903). 



