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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by that Point, therefore at A it iS as Aa,
and at B if dS ß b, hat thofo Arches are
to one another as C foto CB. Fig. 1.
The Brachia of the Ballance are divid-
ed into equal Parts, and one Ounce ap-
plied to the NinthDivifion from the Cen-
ter is as powerful as thi'ee Ounces at the
third Divifion, and -two Ounces at the
Äxth DiviTion as fh'ongly as three
at the Fourth, &c. A Ballance is laid
to be in Æquilibrîo when ‘theJA<Sions of
the Weights upon each Urachium t o move
the Ballance are equal, w that they mu-
tually deftroy each other by the forego-
ing Experiment. Unequal W eights can
TEquiponde rate • lorthis it isre<juifde,that
the Pittance from the Center be i'ecipro-
callyas the Weights3 in that Cafe, if
each Weight bemultiplied by it$I>iftancø,
the Pr odufts wll be equal. On-thisPrin-
ciple are Stillyardsmade to weigh with
one W eight.
Of‘the AXIS tn PïRlTROCHlQ.
The Power hath the greater Torce,
the greater the Wheel is 5 and its Action
increafès in the fame Ratio with the
Wheel’s Diameter; the Weight refifts fo
much