Tables 279, 280. 



249 



CORRECTION FOR TEMPERATURE OF MERCURY IN THERMOMETER 



STEM {continued). 



TABLE 279. — Stem Ooneotlon for Thermometer of Jena Glass (0°-360° 0). 



Degree length i to 1.6 mm.; ^=the observed temperature; /'== that of the surrounding air 

 one dm. away; « = the length of the exposed thread. 



* See Hovestadt's " Jena Glass" (translated by J. D. and A. Everett) for data on changes of thermometer zeros. 



TABLE 280. — Stem Correction for a so-caUed Normal Thermometer of Jena Glass (0°-100° 0). 

 Divided into tenth degrees ; degree length about 4 mm. 



Smithsonian Tables. 



