792 
AECHDEACON PEATT OX THE LSTLLTEsCE OF 
in the last paragraph has also brought us. Thus while the effect of mountain attrac- 
tion alone (as the diagram shows, and my former calculations have shown) would bring 
Fig. 2. 
^ 6. Change of the Sea-level produced hy the Mountains and the Ocean. 
14. Both the positive attraction of the mountains and the deficiency of attraction of 
the ocean have the effect of raising the sea-level at Karachi, near the mouths of the 
Indus in latitude 25°, above that at Cape Comorin. If the difference of level is at all 
sensible, it is important to calculate it, as the Great Survey has brought down two of its 
chains of triangles to these two places on the coast. 
In order to estimate the effect of these disturbing forces upon the sea-level, it is neces- 
sary to find their value along some line joining the two places, and to substffute them 
in the equation of fluid equilibrium. The line I choose is the straight line joining Cape 
Comorin and Karachi, which runs about 30° west of north. I have calculated the effect 
