1905.] On the Platinum and Normal Scales of Temperature. 

 Results (a = 0-003899). 



It will appear that our results, calculated on this basis, are 0'36 

 higher than those of Jaquerod and Wassmer, and 0-10 higher than 

 those of Callendar and Griffiths. The agreement with the latter is, 

 however, good enough to prove our point. 



Benzophenone. Callendar and Griffiths* found the boiling point to 

 be 305-8, while Jaquerod and Wassmer's result can be expressed in 



the form 



T,, = 305-44 + 0-062 (jp-760). 



The result of the single 'experiment which we carried out is as 



follows 



T. 



Date. KO- R- T,. T / + A(3=r5). (J.andW.). 



Nov. 18, 1904 7-3322 15-8171 296-73 306*19 305-83 



The result calculated in this manner is again 0-36 higher than that 

 of Jaquerod and Wassmer, and consequently agrees exactly with that 

 of Callendar and Griffiths. 



Sulphur. According to Callendar and Griffiths the boiling point of 

 sulphur on the constant pressure air 'thermometer is given by the 



expression T ^ = 4 44-53 + 0-082 (^- 760). 



Chappuis and Barker t find for the boiling point of nitrogen on the 



constant volume nitrogen scale the value 445-27. 



Results (R - 7-3325, a = 0-003899). 



As the mean of these results we may take 

 T T(C. and Q-.). 



421*23 



444'14 



* Loc. cit. 



f Brit. Assoc.,' 1899, p. 245. 



a. 



1-50 



