:2G6 b ON THE HEIGHT OF 'THE 



uncertainty in the diftance, amounting to a- quarter of a mile in one 

 iiiflance, and half a mile in the reft, induces uncertainty in the com- 

 puted elevation to no greater extent than 70 or gg feet for the nearer 

 ftations, and 180 for the mo ft remote. An error of a whole minute 

 m an obfervation of altitude affecls the confequent calculation of height 

 in the proportion of about 200 feet for the more diflant ftation, and 130 

 10150 fort-he nearer. But the inflrument, whiah was ufed, mould, 

 with due care, give angles true within that quantity; and the obferver 

 was enjoined to take the angles to the neareft rm$.ute.* 



It would be an extreme fuppofition, that the errors have in every 

 inflance been the higheft poflible, and on the fide of excels. AfTuming 

 however, that they are fo, the elevation, as obiei ved from the two 

 neareft ftations, is not reduced below 26457 and 26467, or, on the mean 

 of both, 26462 above the plains of Go'rakh'fiur. 



We may fafely then pronounce, that the elevation of Dhawalagin, 

 the white mountain of the Indian Alps/f- exceeds 26862 feet above the 

 level of the fea; and this determination of us height taken on the low- 

 ed computation of a geometrical meafurement, is powerfully corrobo- 

 rated by the meafure of an inferior, though yet very lofty mountain 

 obierved from Hations in Rohilkhand. 



It may be fatisfaclory to bring this meafurement to the teft of com- 

 panion with the calculation of heights from like obfervations of fmali 

 angles at great diflances in a cafe where the elevation is otherwife known 



• Tnftruftions, quoted in Ajiatick Refearches, vol. u> p. 448. The wtiterof tl]C r c was acquainted with 

 the inftruinent, and knew the degree <S precifion which it comports. 



+ Satis, Dh&wala whit<-> C/V»'-moun.ain. Vulg. Dhuulagir t the white mountain, K«kKr«TliCft 9 e JW- 

 fault p. 287. It !3,the Mmt-blonc of tjie Himalaya, 



