102 A SuRVEY OF THE 
scale of these barometers only reaches to 19 inches. In instruments 
intended for India, solidity should be considered; we want those which 
will do their work effectually, and ave not anxious that they should be 
small and easily portable, as we can always here find means of carrying 
them. The mean height of the column, by such observations as I 
thought most to be depended on, is 20. 8373 the temperatures of the 
air and mercury being 73. and 63. From which, the height of Gangauire 
above the sea, calculated by M. Raymonnp’s method, ts.......- 10319-4 
By Dr. Hurron’s method Ooi wcvet cscs sec eee es secee ers LOSUOTG 
Latitude observed 27th and 28th May, 1817. 
_ By me, reflecting circle, alternate faces, mean by A. and 
Be Dibra ee. euler Ts eae ecig30." 59), 29 
Large Sextant by Bence—Lieutenant Hergerr, 4 sets ditto, 35° 5 
By me, reflecting circle—8 circummeridional altitudes 
of Spica, being 24 indexes, on alternate faces...... PAL al | 
SY Sea 
Mean latitude of Gangautri..30 59 30 5 
Tuesz were good observations, and refraction is allowed on the alti- 
tudes, according to the barometer and thermometer s and all other correc- 
tions for precession, aberration, nutation, &c. are applied as usual. 
Tue pole star could not be seen on account of the height of the cliffs, 
