50 On the Height of the Himalaya Mountains. [Jax. 



by Mr. Webb for a measurement, conducted by means of obser- 

 vations taken at different stations in that province, was pointed 

 out to him as recognized by the mountaineers to be Dholagir 

 (Dhawala-giri). Mr. Webb took the bearings from four stations, 

 and altitudes from three ; and the particulars of his observation!* 

 are as follow ; 



At station A, situated near Khatur, bearing of 

 the snowy peak P, collected for magnetic 

 variation, and error of adjustment, by an 



azimuth observed at the same time N. 30® 



Altitude 2 



At station B, Nowa-newada on the It apt i : 



Bearing of P N. 49 



At station C, two furlongs W. of Sengaon : 



Bearing of P N. 35 



Altitude 2 



At station D, two furlongs W. of Bhopetpur : 



Bearing of P N. 60 



Altitude 1 



B bears from A by the survey W. 2° 5' N. distant = 43-4 B. m. 



D bears from A W. 7 5 N. . . = 73 5 B. m. 



The bearing of C from A is not used, the side A C measuring 

 only 16*3 B. m. 



CtoB W. 13° 54' N. distant = 29-4 B. m. 



C to D W. 15 ON = 60 



B to D W. 14 3 N m 30-5 



From these data Mr. Webb computes the distance of the peak 

 P from the stations A, C, and D, at the numbers undermen- 

 tioned, viz. : from the station A, by the triangle A P B, 89" 6 ; 

 and by the triangle APD, 89-1 : mean of both computations, 

 89-35 miles, or 471,768 feet. From the station D, by the last 

 triangle, 135-9; and by CPD, 1368: mean of both, 136-35 

 miles, or 719-928 feet. From C, by the last of these triangles, 

 103-4; and by CPB, 102-3: mean of both, 102-85 miles, or 

 543,048 feet. He remarks that several other bearings of the 

 same peak were taken from different stations ; and that, by laying 

 off the rhumb-lines of bearing on the map, they intersect at very 

 inconsiderable distances from the position of the peak, as de- 

 duced from those which were selected for calculation. 



Let us proceed to compute the height of Dhawalagiri (vulg. 

 Dholagir) with the foregoing measures of distance and the ob- 

 served altitudes. 



At the station A we have the distance 471,768 feet, 77-85 

 geogr. miles,* or in a parts of a circle 1° 17' 51"; the chord of 



• The geographic mile, or 60th part of a degree of a great circle, is lierc taker 

 at 6060 feet. 



