22 



abstracts: physics 



STANDARD TEMPERATURES. THERMODYNAMIC SCALE 



SUBSTANCE 



Hydrogen 



Oxygen 



Carbon dioxide. . 



Mercury 



Water 



Na2S04+ IOH2O 



Water 



Naphthalene 



Tin 



Benzophenone. . . 



Cadmium 



Lead 



Zinc 



Sulphur 



Antimony 



Ag3— CU2 



NaCl 



Silver 



Gold 



Copper 



Palladium 



Platinum 



Alumina 



Tungsten 



Carbon arc 



Sun 



PHENOMENON 



Boiling 



Boiling 



Sublimation in gaso- 

 lene 



Freezing 



Freezing 



Transformation to 

 anhydrous salt 



Boiling 



Boiling 



Freezing 



Boiling 



Freezing 



Freezing 



Freezing 



Boiling 



Freezing 



Eutectic freezing 



Freezing 



Freezing 



Freezing 



Freezing 



Freezing 



Melting 



Melting 



Melting 



Pos. crater 



Surface 



TEMPERATURE 



UNCERTAINTY 



-252.7 

 —182.9 



—78.34 



—37.7 







32.383 

 100 



271.90 

 231.85 

 305.90 

 320.92 

 327.4 

 419.4 

 444.6 

 630 

 779 

 800 

 960.5 



1063 



.1083 



1549 



1755 



2000 



3000 



3600 



6000 



0.2 

 0.1 



0.1 

 0.1 

 



0.002 







0.02 



0.1 



0.05 



0.1 



0.1 



0.1 



0.1 



0.5 



1 



2 



1 



2 



2 



10 



15 



30 



100 



150 



500 



REPRODUCI- 

 BILITT 



0.05 

 0.03 



0.03 

 0.05 

 0.001 



0.001 



0.001 



0.01 



0.05 



0.02 



0.03 



0.05 



0.10 



0.03 



0.3 



1 



1 



0.5 



1 



1 



3 



5 



20 



25 



50 

 100 



For the temperatures dependent on atmospheric pressure we have: 



0.000042 (p - 760)2 



As to the chemical purity of the various substances, Myhus has 

 shown! that the following metals may easily be had to 0.01 per cent or 

 better; Au, Ag, Pt, Hg, Cu, Sn, Pb, Cd, Zn. Of the boiling substances, 

 benzophenone and oxygen are the only ones to the purity of which 

 special attention need be given. G. K. B. 



1 F. Mylius, Zs. Anorg. Ch. 74: 407. 1912. 



