250 TABLES 281-282. 



TABLE 281. Standard Calibration Curve for Pt Pt. Rh. (10% Rh.) Thermo-Element 



Giving the temperature for every 100 microvolts. For use in conjunction with a deviation curve determined by cali- 

 bration of the particular element at some of the following fixed points: 



Silver 

 Gold 



melting-pt. 



Dfopside 

 Nickel 



Palladium 

 Platinum 



960.2 

 1062.6 

 1082.8 



I2OI. 



I3QI-5 



I4S2.6 



1549-5 

 1755- 



Qiumv. 

 10296 

 IQ534 

 11941 

 14230 

 14973 



16144 



18608 



TABLE 282. Standard Calibration Curve lor Copper Constantan Thermo-Eleinent. 



For use in conjunction with a deviation curve determined by the calibration of the particular clement at some of the 

 following fixed points: 



Water, boiling-point, 100, 4276 microvolts; Napthalene, boiling-point, 217.95, 10248 mv.; Tin, melting-point, 231.9, 

 11009 mv.; Benzophenone, boiling-point, 305.9, 15203 mv.; Cadmium, melting-point, 320.9, 16083 mv. 



Cf. Day and Sosman, Am. Jour. Sci. 29, p. 93, 32, p. 51; ; ibid. R. B. Sosman, 30, p. i. 

 SMITHSONIAN TABLES. 



