464 TABLE OF ELEVATIONS. Appendix L. 



TABLE OF ELEVATIONS. 



In the following tables I have given the elevations of 300 places, 

 chiefly computed from barometric data. Tor the computations 

 such observations alone were selected as were comparable with 

 contemporaneous ones taken at the Calcutta Observatory, or as 

 could, by interpolation, be reduced to these, with considerable 

 accuracy: the Calcutta temperatures have been assumed as those 

 of the level of the sea, and eighteen feet have been added for the 

 height of the Calcutta Observatory above the sea. I have intro- 

 duced two standards of comparison where attainable ; namely, 

 1. A few trigonometrical data, chiefly of positions around Dorjiling, 

 measured by Lieutenant- Colonel Waugh, the Surveyor- General, 

 also a few measured by Mr. Muller and myself, in which we can 

 put full confidence : and, 2. A number of elevations in Sikkim 

 and East Nepal, computed by simultaneous barometer observations, 

 taken by Mr. Muller at Dorjiling. As the Dorjiling barometer 

 was in bad repair, I do not place so much confidence in these 

 comparisons as in those with Calcutta. The coincidence, however, 

 between the mean of all the elevations computed by each method 

 is very remarkable ; the difference amounting to only thirty feet in 

 ninety-three elevations ; the excess being in favour of those worked 

 by Dorjiling. As the Dorjiling observations were generally taken 

 at night, or early in the morning, when the temperature is below 

 the mean of the day, this excess in the resulting elevations would 

 appear to prove, that the temperature correction derived from 

 assuming the Calcutta observations to correspond with eighteen feet 

 above the level of the sea at Sikkim, has not practically given rise 

 to much error. 



I have not added the boiling-point observations, which afford a 

 further means of testing the accuracy of the barometric compu- 

 tations ; and which will be found in section J of this Appendix. 



The elevation of Jillapahar is given as computed by observations 

 taken in different months, and at different hours of the day ; from 

 which there will be seen, that owing to the low temperature of 



