Popular Lectures on Science and Art: Delivered in the Principal Cities and Towns of the United States, Volume 2, Part 2

admitted air-pump angle aperture appear applied ascends atmospheric air atmospheric pressure attached axle beam boiler boiling bottom Boulton and Watt celestial equator centre cistern closed cock combustion communication condenser constellation constructed contrivance corresponding crank cubic cylinder descend diameter diminished direction distance double star downward elastic engine equal feet fire-box firmament flues fly-wheel force fuel greater half heavens Herschel imparted inclined plane increased latent latent heat length lever liquid machine magnitude mercury meridian motion moving power nebulous necessary observed opened oxygen pass passage pipe piston piston-rod placed plate position pounds produced proper motion proportion pulley raised ratchet-wheel rendered represented in fig resistance revolution revolving rope screw sensible heat Sir William Herschel slide space square inch steam steam-engine steam-pipe steam-valve stroke sufficient supply suppose surface telescope temperature throttle-valve tion tube upward vacuum valve vapor velocity vertical vessel Watt weight wheel