489 

 TABLE I. 



Temperature 



Duration of thej pjse of the level 

 observations 



in hours. 



of oil in mm. 



Rise in mm. 



per hour 



49°60 

 59.60 

 60.45 

 £2.40 

 64.90 

 66.90 

 84.40 



lO'/o 



5 



3'/2 

 9'/2 



4 



16'/2 



6 



With ii second dilatometei we got tlie following results 



TABLE II. 



The transition temperature has thus been fixed at 64°. 9 within 

 0.1 degree. 



12. It may be pointed out here that the expansion which accom- 

 panies the transition of Cadmium-« into Cadmium-/? (at 64°. 9) explains 

 the disintegration of cadmium wires observed at 80° by Matthiessen 

 and VON Bose. 



13. We hope to be able to give shortly the details and conclusions 

 of our research, as well as the values of the density for the two 

 pure modifications of cadmium. 



Utrecht, October 1913. van 't HoEF-Laboratory. 



(November 27, 1913). 



