Nitrogen Thermometer from Zinc to Palladium. 161 















The Eeich - 



Substance 



Point 



Atmosphere 



Crucible 



Temperature 



sanstalt 















Scale 



Zinc 



Melting and 

 freezing 



Ah 



Graphite 



418-2° 



±0-3 



419-0° 



Antimony 



Do. 



Carbon 

 monoxide 



Do. 



629-2 



±0-5 



6306 



Silver 



Do. 



Do. 



Do. 



960-0 



+ 0-7 



961-5 



Gold 



Do. 



Do. 



Do. 



1062-4 



±0-8 



1064-0 



Copper 



Do. 



Do. 



Do. 



1082-6 



±0-8 



1084-1 



Diopside 



Melting 



Air 



Platinum 



1391-2 



±1-5 





(pure) 















Nickel 



Melting and 

 freezing 



Hydrogen 

 and Nitro- 

 gen 



Magnesia 

 and Magne- 

 sium Alum - 

 inate 



1452-3 



±2-0 





Cobalt 



Do. 



Do. 



Magnesia 



1489-8 



±2-0 





Palladium 



Do. 



Air 



Pure Mag- 

 nesia 



1549-2 



±2-0 



1575-* 



Anorthite 



Melting 



Do. 



Platinum 



1549-5 



±2-0 





(pure) 















In addition, the following temperatures were incidentally obtained : 



Cadmium 



Melting and 

 freezing 



Air 



Graphite 



320-0 ±0-3 



321-7 



Aluminum 



Freezing 



Carbon 

 monoxide 



Do. 



658-0 ±0-6 



657- 



Platinum 



Melting 



Air 





1755- 





Geophysical Laboratory, 



Carnegie Institution of Washington, 



Washington, D. C, December 24, 1909. 



* Holborn and Valentiner, loc. cit. 



