BAROMETRICAL MEASUREMENT OF HEIGHTS. BAILY. 



EXAMPLE. 



Thermometer in open air, 

 Attached Thermometer, 

 Barometer, 

 Latitude of the place 



B = 0.00031 



log ft' = 1.37401 



1.87432 



log 3 1.47784 

 D = 0.10352 



Upper Station. Lower Station. 



t 1 = 70.4, * = 77.6. 



T> = 70.4, T = 77.6. 



ft 1 = 23.66 inches, ft = 30.05 inches. 



< = 21. 



log D 9.01502 



C = 0.00087 



A = 4.81940 



3.83529 



= 6843.7 English feet. 



D 



71 



