2m ON THE HEIGHT OF THE 



bearing on the map, they interfeft at very inconfiderable diftances 

 from the pofition of the peak as deduced from tho re which were fe- 

 le&ed for calculation. , . 



Let us proceed to compute the height of Dkawalagiri (vulg. Dholagir) 

 with the foregoing meafures of diltance and the obferved altitudes. 



At the (ration A* we have the diltance 471768 feet, 77,85 geographic 

 miles,* or in parts of a circle i° 17 51"; the chord of which in feet is 

 471758- The altitude obferved being 2 n 48', and the refraction being 

 taken at T V h .of the intercepted arc, the angles are S 3 r 20 26" 15'* 

 and P 86° o' 38'' 15", with the fide S B 471758; whence we have the 

 fide B P, or height of the mountain, 27558 feet. 



By a firnilar calculation of the altitude of the fame mountain obferv- 

 ed from the fcations C and D ; viz. 2 19' and i° 22', or corrected for 

 refraction a° 11' 32" and i° 12' 6", with the di (lances above found, 

 which in parts of a circle are i° 29' 36" 36" and i° 58 48", and, re- 

 duced to the chords of the arcs in feet, 543031 and 719803, the height 

 comes out 279C0 and 27573 1 or on a mean of the three, 27677 feet above 

 the plains of GoraKhpur ; and reckoning thefe to be 400 feet above the 

 mouth of the Ganges as inferrible from the defcent of the ftream of 

 rivers, the whole height is more than twenty-eight thoufand feet above 

 the level of the fea. 



* The geographic mile, or fixtieih part of ;i degree of a great circle, is here taken at 6060 feet. The 

 length of the meridional degree in different latitudes, accor ing to the Iatrft meafureiments, bring 60995, 

 fathoms in la it ude 66° 20', 60820 in latitude 52° 2', 60783 in latitude 46 12' and 60487 in latitude 

 li° 6'; whence may be concluded 60600 neatly b-tween the latitudes 27° and 31 ; and this meafure is 

 employed without correction er modifica'i >n, though the pofition of the arcs be at acute ;nJesto the line of 

 ihe raeridian; greater precifion in reducing the dilbnces to pnns of a great circl.* appearing to be unneceffarye 

 m the utrnoft accuracy would make little difference in the computed height of a mouBtai&j 



