Latent Heat of Evaporation of Benzene. 



17 



40°, and 



12. Value of n v 



The values of Rx were redetermined at temperatures 30°, 

 50°. The corrected results showed falls of *0012, 

 0012, and *0016 respectively from the values of 1894. These 

 quantities have, therefore, to he subtracted from the values 

 given in Paper W, table viii., but the correction is only 

 1 in 10,000 of R x . 



The following table gives the values of R x used during the 

 reductions of the observations on benzene. 



(The suffix to R denotes the potential-difference in terms 

 of a Clark cell.) 





Table III. 





Temp. 



R 3( .. 



R 4e . 



K-5C- 



o 



20 



10327 



10-329 



10333 



30 



10-351 



10 353 



10-357 



40 



10-374 



10-377 



10-381 



50 



10-399 



10-401 



10-406 



SRper l°C. = -0024. 



The re-standardization of the Clark cells has already been 

 referred to (section 6, p. 8). 



13. Q s . 



No alteration in the values of Q s at 30° and 40° C. appears 

 to have taken place. 



The values of Q s at 50° and 20° as given in Paper W, 

 pp. 332, 333, appeared to have undergone alteration, and we 

 therefore made a careful redetermination at those temperatures. 

 The method adopted was that described on p. 292, Paper W, 

 viz., the rate of rise in temperature at null-point was deter- 

 mined 

 (1) when the heat-supply was that due to the stirring only 





and 



(2) when the heat-supply was that due to the stirring and a 

 Phil. Mag, S. 5. Vol. 41. No. 248. Jan. 1896. C 



