Tables 221 and 222 



TABLE 221, — Standard Calibration Curve for Pt — PtRh (10 r / f Rh) Thermoelement 



^45 



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

 bration of the particular element at some of the following fixed po.nts: 



Water 



Naphthalene 



Tin 



Benzophenone 



Cadmium 



Zinc 



Sulphur 



Antimony 



Aluminum 



boiling-pt. 



melting-pt. 

 boiling-pt. 

 melting-pt. 



boiling-pt. 

 melting-pt. 



ioo.o 



217.05 



231 9 



3059 



320.9 



419.4 



444-55 



630.0 



658.7 



643mv 

 1585 

 1706 

 2365 

 2503 

 343o 

 3672 

 5530 

 5827 



Silver 



Gold 



Copper 



Li ? Si0 3 



Diopside 



Nickel 



Palladium 

 Platinum 



melting-pt. 



g6o.2 

 1062.6 

 1082.8 

 1 201. 

 I39I-5 

 1452.6 



1549-5 

 1755- 



giiimv. 

 10296 

 10534 

 11941 

 14230 

 14973 



16144 



TABLE 222. — Standard Calibration Curve for Copper — Constantan Thermoelement 



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

 following fixed points: 



Water, boiling-point, ioo , 4276 microvolts; Naphthalene, 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. 1. 

 Smithsonian Tarles. 



