Scientific Dialogues: Intended for the Instruction and Entertainment of Young People, Inwich the First Principles of Natural and Experimental Philosophy are Fully Explained. Vol. II, IV-VI.J. Johnson, 1809 |
Términos y frases comunes
admit the air Air-guns air-pump ascend atmosphere avoirdupois barometer barrel bason bladder body boiler boiling water bottle bottom brass called catgut cause ceiver Charles column condensed air consequently CONVERSATION cork cury dense distance echo elastic Emma Eolian equal exhaust the air expands experiment external air Fahrenheit's fair weather fall Father fixed flask fluid force freezes funnel glass HARVARD COLLEGE hear heard heavier hygrometer instrument lighter means melts mercury mercury falls mercury rises miles motion move multiply ounces piece pipe piston Plate 11 pounds pressure produced pump Pyrometer quantity of air quart quicksilver rain rain-gauge rarefaction Reaumur's receiver red heat rise round scale screw sound space specific gravity square stance stand steam steam-engine Stentor stop-cock striking string suction surface tenths thermometer tion tube turn the handle tween vacuum valve velocity vernier vessel weight Weybridge wind
Pasajes populares
Página 176 - Soon shall thy arm, unconquered steam, afar Drag the slow barge, or drive the rapid car ; Or on wide waving wings expanded bear The flying chariot through the fields of air ; — Fair crews triumphant, leaning from above, Shall wave their fluttering kerchiefs as they move, Or warrior bands alarm the gaping crowd, And armies shrink beneath the shadowy cloud.
Página 244 - ... 1. The rising of the mercury presages, in general, fair weather, and its falling foul weather, as rain, snow, high winds, and storms.
Página 89 - Perhaps this is speaking rather too positively, if there be, as I think there are, some other mediums that will convey it farther and more readily. It is a well-known experiment, that the scratching of a pin at one end of a long piece of timber, may be heard by an ear applied near the other end, though it could not be heard at the same distance through the air. And two stones being struck smartly together under water, the stroke may be heard at a greater distance by an ear also placed under water...
Página 244 - When the surface of the mercury is convex, or stands higher in the middle than at the sides, it is a sign the mercury is then in a rising state ; but if the surface be concave or hollow in the middle, it is then sinking.
Página 156 - ... round the youth explosive Steam aspire, In gathering clouds, and wing'd the wave with fire; Bade with cold streams the quick expansion stop, And sunk the immense of vapour to a drop. Press'd by the ponderous air the piston falls Resistless, sliding through its iron walls; Quick moves the balanced beam, of giant birth, Wields his large limbs, and nodding shakes the earth.
Página 9 - How, as in brazen pumps the pistons move, The membrane valve sustains the weight above ; Stroke follows stroke, the gelid vapour falls, And misty dewdrops dim the crystal walls ; Rare and more rare expands the fluid thin, And silence dwells with vacancy within.
Página 177 - At the cannon foundery, in Moorfields, hot metal was poured into a mould, that accidentally contained a small quantity of water, which was instantly converted into steam, and caused an explosion, that blew the foundery to pieces.
Página 154 - Having drank a flask of Florence wine at a tavern, and thrown the flask on the fire, he perceived that the few drops left in it were converted into steam ; this induced him to snatch it from the fire, and plunge its neck into a bason of water, which by the atmospheric pressure, was driven quickly into the bottle.
Página 246 - In fair weather, when the mercury falls much and low, and thus continues for two or three days before the rain comes, then expect a great deal of wet, and probably high winds.