6656CAPVT IV.
L.
The Shanck of the Piſton, whoſe lower Part is a
circular Plate, in diameter near equal to the Cylin-
der, and cloſeth thereto with the Leather round the
Edge having always 6 or 8 Inches of water upon it, to
prevent the atmoſphere from getting down, and
when the Steam is let into the cylinder, which takes
of or contrevails the Preſſure on the Piſton, it roſes
with the inner End of the great Leaver b, by a Coun-
treballance an the other End b. 2. and when a Va-
cuum is made, it deſcends by the weight of the atmo-
ſphere, and brings down the End of the Leaver b
with a Power capable of raiſing at the other End b 2
any weight, not exceeding the Preſſure of the at-
moſphere on a Cylinder of the diameter made
uſe of.
circular Plate, in diameter near equal to the Cylin-
der, and cloſeth thereto with the Leather round the
Edge having always 6 or 8 Inches of water upon it, to
prevent the atmoſphere from getting down, and
when the Steam is let into the cylinder, which takes
of or contrevails the Preſſure on the Piſton, it roſes
with the inner End of the great Leaver b, by a Coun-
treballance an the other End b. 2. and when a Va-
cuum is made, it deſcends by the weight of the atmo-
ſphere, and brings down the End of the Leaver b
with a Power capable of raiſing at the other End b 2
any weight, not exceeding the Preſſure of the at-
moſphere on a Cylinder of the diameter made
uſe of.
OOA ſmal Leaver, and its quarter Wheel, whoſe
two Ends n. 1. et 3 are alternatly liftet up by the Engi-
nes motion.
two Ends n. 1. et 3 are alternatly liftet up by the Engi-
nes motion.