TABLE 127. 145 



DETERMINATION OF HEIGHTS BY THE BAROMETER. 



Formula of Babinet : Z = C 



C (in meters) = 16000 fi -f- iil+J)~j metric measures. 

 I- 1000 -I 



In which Z = difference of height of two stations in feet or meters. 

 0) B barometric readings at the lower and upper stations respectively, corrected for all 



sources of instrumental error. 

 t , t =r air temperatures at the lower and upper stations respectively. 



Values of C. 



Values only approximate. Not good for great altitudes. A more r ccurate formula with 

 corresponding tables may be found in Smithsonian Meteorological Tables. 



SMITHSONIAN TABLES. 



