The First Steam-Boat
Forfatter: Jonathan Hulls
År: 1860
Forlag: E. & F. N. Spon
Sted: Bucklersbury
Sider: 48
UDK: 629.120(09)
Description And Draught Of A New-Invented Machine For Carrying Vessels Or Ships Out Of, Or Into Any Harbour, Port, Or River, Against Wind And Tide, Or In A Calm.
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S»§ 1S1SÄ
A
Defcription and Draught
EFORE I 1peak of the
Ma-chine itfetf, it will be
neceflary to explain the
Nature of ihofe powers
thatare applied!o it.
-^nd of Mechanical Powers.
The Intent of nioft ^Mechanical Ma-
chines is to raiCe great Power or Weight
with a (mail intensity of Power; or, on
the other Hand, to caufe a Motion to be
more Swift, or to continue a'Motion alone,’
ipace or Time by a greater weight or force.
But there was never any Infiniment yet
could be made to move a Heavy Body
by a Light er, through equal perpendicular
Ipace : If thal could be perform’d, the
perpetual Motion might be eafily brought
to Perfection) but where Nature contra-
diâhs, it is in vain to Attempt.