INTENSITY AND DIRECTION OF THE FORCE OF GRAVITY IN INDIA. 305 



TABLE H!E. 

 Summary of the four preceding tables. 



It will be seen that in the Himalayas the deflections are northerly and large, but 

 that as we move southwards from the mountains they decrease rapidly more rapidly 

 in fact than the law of gravitation requires. 



As we recede still further from the Himalayas we enter the positive zone, and here 

 we find a region 1000 miles long and 200 broad running parallel to the Himalayas, 

 throughout which the plumb-line is always deflected towards the south. 



As we progress still further southwards we enter the Indian peninsula ; on crossing 

 the boundary line between the 2nd and 3rd regions we find that the deflection of the 

 plumb-line changes its direction and sign ; between latitudes 24 and 18, from coast 

 to coast, strong northerly deflections averaging 6" now prevail ; as we move south- 

 wards towards Cape Comorin these northerly deflections slowly decrease, and in the 

 extreme south of India change to southerly. 



In North-western India the latitude observations have not brought to light any 

 marked characteristic. This region is west of the Himalayas, and longitude deter- 

 minations, if made at numerous stations, would be more likely than latitude 

 observations to yield instructive results. 



The opinion had been expressed that the large deflections of 30" and 40", discovered 

 in the sub-Himalayas near Mussooree and Phallut, might prove to be local and 

 exceptional, and that it was unsafe to assume them characteristic of the region. To 

 test the correctness of this view, Captain COWIE observed for latitude in April, 1903, 

 at the Himalayan Station of Birond, and found that the direction of gravity was 

 deflected here 44" towards the north ; in November, 1903, Captain H. WOOD, R.E., 

 observed for latitude at two stations in Central Nepal and met with deflections of 

 33" and 38". All the evidence that is slowly accumulating tends, therefore, to show 



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