356 
ARCHDEACON PRATT ON THE CONSTITUTION 
Table VIII. 
Differences of Gravity. 
Stations. 
Relative effects of 
local attraction 
deduced from 
Pendulum 
Observations. 
Kesidual error 
Dr. Young. 
s after correction by t 
This 
wi= 50. 
ae methods of 
nypothesis. 
7 U — 100. 
Indian Arc Stations. 
Bangalore 
+384 
-562 
- 78 
-557 
Damargicla 
-323 
-926 
-455 
-584 
Kalianpur 
+341 
-208 
+338 
+315 
Kaliana 
Coast Stations. 
Punnae 
-707 
-957 
+ 69 
+320 
Alleppy 
+302 
+314 
+331 
+360 
Mangalore 
-166 
-154 
- 122 
- 79 
Madras 
-197 
-192 
-138 
- 78 
Cocanada 
+ 142 
+ 153 
+216 
+291 
Ocean Station. 
Minicoy 
+ 894 
+ 906 
+ 31 
+ 102 
24. This Table contains all the final results necessary to enable us to judge of the 
truth of the hypothesis which I advocate in this paper, and which I will now discuss. 
From the first column of numbers we learn that, according to Pendulum Obser- 
vations, gravity at the four stations I have chosen north of Punnae, when every cause of 
variation is eliminated except Local Attraction, is alternately in excess and defect of that 
at Punnae, the first (at Bangalore) being in excess. In the whole range of stations in 
my list, the effect on gravity at Ivaliana and Minicoy is the most important — the first in 
defect, the last in excess. 
I will now consider how far the effects exhibited in this Table are accounted for on 
Dr. Young’s (or the usually received) method, and my own. 
The Coast stations shall first be taken. In these neither method has much success in 
accounting for the local attraction. A survey of the form of the land and sea-bottom 
near those places would very likely change this result. The local vertical attraction at 
Alleppy is the greatest, and is in excess. This may be accounted for probably in part 
by the sea between it and Minicoy being deeper than the general slope which I have 
assumed in the calculation, as will be understood when I come to refer to Minicoy. 
None of the local vertical attractions at the coast stations are very large. 
Next let us take the Indian Arc and Ocean Stations. The second column of numbers 
shows that Dr. Young’s correction, so far from improving matters, introduces very large 
residual errors, and those on the Arc are all in the same direction. And I may add that, 
if his method of allowing for the effect of all superficial causes of disturbance is fully 
carried out, a negative quantity must be added to correct the effect of the Himalayas at 
Kaliana, as they are below its horizon, and a positive quantity at Punnae for the sea. 
And when all are referred to Punnae the whole series of numbers for this mode of cor- 
rection, which disregards the state of the interior, is even greater than before. The third 
and fourth columns show the effect of the method of this paper, in the two cases of the 
