801 



lo make the lieat-ti-aiisport between it aii<l llic walls of (lie I'liriiaco 

 as s^'inmetrical as possihle. The eyliiiders, which had a diameter 

 of about 2 or 3 inin., wei-e carefully polished, and they were fixed 

 in the sinall resistance-furnace B i^Fig. 1) by means of a fine platinum- 

 wire, wrai)ped round fheir curved surfaces; the furnace was of the 

 type, used in this laboratory for microscopical purposes, and described 

 more in detail by one of us on another occasion ^). 



By means of the tine platinum-wire the small cylinder was fixed 

 Just above the junction of the thermoelement E, made of i<latiuum- 

 platinumrhodium, and used in this furnace as the crystalsupport ; 



^ 



be 



1) F. M. Jaeger. Eine Anleiluiig zur Ausliihrung cxakter physiko-chemischer 

 Messungen bei höheren Temperaturen; Groningen (1913), pag. 102, 103. 



