of the Plumb-line in India. 15 
density at the stations in that part of the meridian as com-- 
pared with Punne, is :— 























| | | Deficiency in sramber of | 
| Height | vibrations in 24 hours | 
N. latitude. Station. | in feet. | eres for the sea- | 
20 44 Badgaon | 1120 | ~ 141 | 
| 23 36 | Ahbmadpur |, 1693 | — 1:76 
| o4 7 | Kalianpur | 1763 ~ 0-98 | 
| 2456 | Pahargarh | 1641 Sp OB 4). 4| 
/ 2657 | Usira bab ick uc 
ieee 1 |) Dataira |. 17 | a Tig, 64 alr 
2930  Kaliana | 810 | — 3:53 
2953 | Nojji | 79 | — 425 
3019 | Dehra Dun | 2242 — 6:68 
| 30 27 | Mussooree | 6920 | — 5:48 
| £3315 | Moré | 15406 | 21°19 



Prefixed to the Report is given a cross-section of outer: 
Himalayan ranges on the meridian of 77° 25! to the scale of 
one inch to four miles. This was constructed by Col. St. G.. 
C. Gore, R.E., Surveyor-General of India. It appears from 
this section that through a distance of 124 miles the summits. 
rise fairly regularly from the plains to the height of 18,000 
feet, so that as far as attraction is concerned the outer ranges 
may be taken to be approximately represented by an inclined 
plane, whose base is 124 miles, and angle of elevation 
1° 31’ 28”, Beyond these ranges lies the Tibetan plateau, 
estimated to be on an average three miles high and 400 miles 
across. To facilitate calculation | suppose the entire area 
to be rectangular, and to extend to an equal distance on 
each side of the meridian of the station. Pratt estimated 
the area to be equal to that of a circle of radius 335 miles *.. 
This would make the length of the rectangular area about 
880 miles. I suppose this mass to have been accumulated. 
* ¢ Figure of the Earth,’ 4th ed. art. 201, 
