253 



between 18°.8 C. and 89°.5 C. : 0.00042 



between 22°.0 C. and 90^3 C : 0.00044 



Average: 0.00043 



Coefficient of dilatation of the solution containing 4.61J "/„ NiCl, and 

 6.782 7„ NH, between 4''.H C. and 19°.l C. : 0.00023 

 between 3°.7 C. and 19°.8 C . : 0.000 18 

 Average: 0.00020 



between 19M C. and 59°.0 C. : 0.00037 

 between 19'.8 Ü. and 6Ü°.8 C . : 0.00039 

 Average: 0.00038 

 These measurements were also executed under a hydrogen atmos- 

 phere and gave the following results: 



Average: 1.302 

 y",. . 2' calculated from the above average 444.8 for tl-n^^,- 

 gives 1.303. 



X^' . 7' calculated from the above average 418.6 for X^ijooc S'^es 

 1.226. 



From the results obtained it is evident, that within the limits of 

 ex|)erin)ental accuracy the atomsusceptibilitj of nickel in solutions 

 of nicUelsaKs follows Cirik's law. 



Zdrich, July 1914. 



Eidijenötidsches Physikyebaude. 



