Nitrogen Thermometer from Zinc to Palladium. 147 



Table VIII— ( Concluded) 



Exp. 



No. 



Integrated 



correction 



to outside 



elements 



Degr's | M.V. 



Standard Elements 



Outside ' Fixe cl 

 Corrected Pt. 



Inside 

 Uncor- 

 rected 



Fixed 

 Pt. 



Temperature 



By 



Inside 

 Element 



By 



Outside 

 Element 



Weight 



Inteijiolation Points— (Cont.). 



62 



67 



128 



132 



o-o 



! 



A 7895 

 D 7869 



7900 



7881 Z 7829 



7848 



854-2° 

 854-9 

 ~ 854-6 



855-5° 



-0-2 



-2 [A 7883 

 D 7859 



7900 1 



7881 Z 7820 



7848 



854-0 

 854-5 

 854-3 



855-0 







Mean for A = 



-900, 



854-7° 





2 E 12004 

 F 12001 

 G 12008 

 'H 12000 



0-1 + 1 



E 11947 

 F 11952 

 G 11950 

 H 11941 



12000 i 



12001 I 

 12001 



12003 C 11914 



12000 

 11097 

 12001 

 12003 



C 11887 



11928 



11928 



129 



-0-6 - 5 



E 13107 



13100 







F 13102 



13101 







G 13110 



13101 







H 13101 



13103 



C 13007 



• 



Mean for E = 12000, 



13028 



Mean for E = 13100, 



1206-3 



1206-7 



1206-1 



1206 9 



1206-5 



1206-0 



1205 3 



1205-8 



1206-8 



1206-0 



1206-4° 



1207-8 



1205-0 



1297-4 

 1297-9 



1297-2 

 1298-1 

 1297-7 



1298-5 C 



1299-3 



(Continued from p. llf.0.) 



If the investigator's responsibility could be made to end 

 with the representation of his own observations, no serious 

 difficulty would arise, but such a formula when published is 

 placed in the hands of many who do not realize that no physi- 

 cal significance was attached to the formula by its author and 

 that its extrapolation in either direction would be fraught with 

 grave danger. A mere inspection of the equation is sufficient 

 to show that the electromotive force does not become zero for 

 zero temperature, thereby immediately proving that extrapola- 

 tion downward does not correspond to the observed readings 

 of the thermoelement. In the Keichsanstalt equation this 

 constant term was in fact sufficiently large to lead to absurdi- 

 ties if the extrapolation was continued far below 300°. 



Notwithstanding the warning contained in this situation, 

 extrapolation upward of the thermoelectric curve has been 



