CORRECTION FOR THE TEMPERATURE OF THE EMERGENT 

 MERCURIAL COLUMN OF THERMOMETERS. 



T = t — 0.000086 n{t' — t) — Fahrenheit temperatures. 

 T — t - 0.000155 n{t' — t) — Centigrade temperatures. 

 T = Corrected temperature. 

 t = Observed temperature. 



t' = Mean temperature of the glass stem and emergent mercury column. 

 n = Length of mercury in the emergent stem in scale degrees. 



— " { than t the numerical correction is to be \ 



lower ) ( 



added. 



Table 7. 



CORRECTION FOR FAHRENHEIT THERMOMETERS. 



Values of 0.000086 n(t' — t) 



Table 8. 



CORRECTION FOR CENTIGRADE THERMOMETERS. 



Values of 0.000155 nit' — t) 



Smithsonian Tables. 



14 



