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.
Søgning i bogen
Den bedste måde at søge i bogen er ved at downloade PDF'en og søge i den.
Derved får du fremhævet ordene visuelt direkte på billedet af siden.
Digitaliseret bog
Bogens tekst er maskinlæst, så der kan være en del fejl og mangler.
.Again, if you were to t aKe a barometer
of 5 or 6 Foot Long anå fill it with Mer-
cury and Immerfe the open £nd into a
Cittern of the fame, the Mercury WllUmK
down out of the Tube into the Ciftern w-
till the height of the Mercury in the
Tube is about the height of 29 or finches
(according to the weight of the Atmos-
phere at that Time) thenii you immerle
this Inftrument in Water, the Mercury
will rife one Inch forthe Tnftru merit's link-
ing; fourteen. . ,
If ™u take two Tubes and join them
together, io that they OiaD have a Com-
munication at the bottom by aMJHole,
put fome Mercury into one of the
and it -will life to an equal height in both,
then pour in Water into either unUlthis
Water has driven cut all the Wcury in-
to one Tube, ana then flop; and you’ll
■gnd the Water to ftand about 14 Times
as high as the Mercury, becaufe -the-y
jÇ,duînonderate at thoff heights.
It may be obftrved what an exattji-
quilibïiuin is maåe by TluîJs ; foi, if'yovj
diiturb-the Mercury in the Cittern vzhere-
intheBaroTneterisimmejftå,you will lee
the Mercury ad in the Tube in the fame
manner a$ a nice Ballance-Beam that Ï-
quiponderates.