Retains

‘ than the plain?’

se OA OE Sek

ly can the direGion of the plough coincide with the direGtion of the force. The matter then is reduced to this queftion,‘ Whether ‘the right fide of the plough can admit of ‘ any curved figure, that meets with lefs re- ‘{tenceand performs work as well or better

That no curved figure can meet with fo little refiftence as the plain, fuppofing al- ways the greateft breadth in both cafes the fame, even in moving through a fluid of very little tenacity or fri€tion, feems abun- dantly evident from this fingle confideration, that it muft conftantly drive the fluid more be- fore it. The plain allowsthe fluid to flide eafily along its furface, and confequently meets with lefs refiftence; but the leaft curve or bending ¢ above the plain muft more or lefs repel the particles towards the parts from which they came, or in the dire&tion in which the furface moves, and therefore be expofed to proportionally great- er refiftence.

This + See fig. 7.