Table 32. 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 



Formula of Bablnet. 



C (in feet) r= 52494 i + ° —English Measures. 



C (in metres) = 16000 i 4 ^^-2 — Metric Measures. 



' L 1000 J 



In which Z ^ Difference of height of two stations in feet or metres. 



B^, B = Barometric readings at the lower and upper stations respectively, 

 corrected for all sources of instrumental error. 

 to, ^ = Air temperatures at the lower and upper stations respectively. 



Values of C. 



ENGLISH MEASURES. 



METRIC MEASURES. 



Smithsonian Tables. 



118 



