JB/539/442/002

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Rivers are consist of water running down an inclined plane by
the force of gravity. Were it not for the resistance the water
meets with in the bed of the river the as well as at the bottom as at
the sides the water would run down infinitely faster.

Bodies floating in this running water descend are acted upon
also by the force of gravity. They have a tendency to move with
as great a velocity as that which the water itself would have
had were it not for the met with there no resistance against the bed of the
river. These floating bodies do not touch the bed of the
river, their motion is not impeded till we come to consider
the resistance they meet with in the water itself. But they
meet with none till their motion excedes that of the water.
Their motion then must excede that of the water, and that
the more so the less they are affected by that resistance:
hence the better their shape is adapted to divide the water,
and the greater proportion their gravity has to their surface
of resistance the quicker they will be impelled by their
gravity through the medium which tends to retard their
motion. They would acquire, were it not for their resistance they meet with from or the
water, precisely that degree of velocity which the water itself would acquire
were it not for the resistance it meets with from against the land.

1783 } S.B. Petersburgh
Oct. } to
15/ } J.B. - Linc. Inn
26 } Velocity of floating
bodies in Rivers
Sh. II
(No 1)

Identifier: | JB/539/442/002 "JB/" can not be assigned to a declared number type with value 539.
Date_1	1783-10-19	Marginal Summary Numbering
Box	539	Main Headings
Folio number	442	Info in main headings field
Image	002	Titles
Category	Correspondence	Number of Pages
Recto/Verso		Page Numbering
Penner	Samuel Bentham	Watermarks
Marginals		Paper Producer
Corrections		Paper Produced in Year
Notes public		ID Number
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