9 jun 1739 ano - stephen hales
dredging tips
Descrição:
https://archive.org/details/philosophicalexp00halerich
As to the Propofal at the end of
this Book, to cleanfe fome Rivers and
Harbours of Mud ; it firft occurred
to me many Years (ince, on feeing
the flow and expenlive Method, of
cleanfing the Yarmouth River near
Yarmouth, by means of a large
Wheel fix'd to a Barge, and turned
by Horfes. The Wheel in turning
round, takes up Mud in large Buckets^
which are fixed to it, and difcharge
A 4 it
viii The DEDICATION.
it into another Barge. A Method
which they are under a neceflity of
ufing in Holland, where the Waters
move with a very flow progreflive
motion : But in Waters which have a
greater velocity, I am perfuaded that
it would be a much more effectual,
and expeditious, and confequently a
cheaper and better way, to cleanfe
away Mud, by much ftirring of it
thus with Horfe-Rakes.
I fhall be very glad if what I have
here offered, fhall prove of any fer-
vice to the Publick, and be confe-
quently acceptable to Your Lordfhipsu
Being with all due Refpeft,
MY LORDS,
Tour Lord/hips
Obedient humble Servant^
STEPHEN HALES.
Adicionado na linha do tempo:
Bartram Barton
Data:
