780 
aechdeacon peatt ox the ixelhexce or 
6 , 2 Hmothesis regarding the form of the lottorn of the sea. 
4. To calcoLte this force, it is necessary, hr our ignorance of the to of ttootto. 
of the sea, to resort to hypothesis. In doing so rt ^ being 
want to find the aggr-egate effect at certam places — atoe y ^ 
HI in India and not to find the law in passing from one pomt to anothe 
toc“ the ocean, an average representation of its to uiU he gnrte as good for our 
purpose as an accurate knowledge of all its vai-iations of depth. 
