Scientific Dialogues, for Young People: in which the First Principles of Natural and Experimental Philosophy are Explained, Tom 41815 |
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Strona 10
... valve , opening up- wards ; these valves communicate with a concealed pipe that leads to K. The barrels include also move- able pistons , with valves opening upwards * . Emma . How are they moved ? Father . To the upper parts of the ...
... valve , opening up- wards ; these valves communicate with a concealed pipe that leads to K. The barrels include also move- able pistons , with valves opening upwards * . Emma . How are they moved ? Father . To the upper parts of the ...
Strona 13
... valve , and escape by the rack c ? Father . It did : and by the alter- nate working of the pistons , so much of the air is taken away , that the quantity left has not force enough to raise the valve . Charles . Cannot you take all the ...
... valve , and escape by the rack c ? Father . It did : and by the alter- nate working of the pistons , so much of the air is taken away , that the quantity left has not force enough to raise the valve . Charles . Cannot you take all the ...
Strona 14
... valve sustains the weight above , Stroke follows stroke , the gelid vapour falls , And misty dew - drops dim the crystal walls ; Rare and more rare expands the fluid thin , And silence dwells with vacancy within . BOTANICAL GARDEN . The ...
... valve sustains the weight above , Stroke follows stroke , the gelid vapour falls , And misty dew - drops dim the crystal walls ; Rare and more rare expands the fluid thin , And silence dwells with vacancy within . BOTANICAL GARDEN . The ...
Strona 44
... valve , by which I can fix it on the plate of the air - pump , and exhaust its air ; and you will see , that when there is no power within to support the pressure of the atmo- sphere from without , it will be broken into a thousand ...
... valve , by which I can fix it on the plate of the air - pump , and exhaust its air ; and you will see , that when there is no power within to support the pressure of the atmo- sphere from without , it will be broken into a thousand ...
Strona 46
... up with a screw , and a fine oiled silk valve at D. I will now screw the flask on the plate of the air - pump , and exhaust the air . You see , in its present exhausted state , it weighs 46 PNEUMATICS . Of the Weight of Air.
... up with a screw , and a fine oiled silk valve at D. I will now screw the flask on the plate of the air - pump , and exhaust the air . You see , in its present exhausted state , it weighs 46 PNEUMATICS . Of the Weight of Air.
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Scientific Dialogues, for Young People: In Which the First Principles ..., Tom 5 Jeremiah Joyce Podgląd niedostępny - 2016 |
Kluczowe wyrazy i wyrażenia
14 grains admit the air air is taken air rush air-pump atmosphere barometer barrel bell bladder blows body boiler boiling bottle bottom brass called catgut cause Charles cold common compressed condensed air conductor of sound consequently CONVERSATION cork degree distance duated echo effects elastic Emma Eolian equal exhaust the air experiment external air Fahrenheit fall Father feet fish fixed flask Florence flask fluid force glass hear heard heat heavier hollow earth hygrometer inches instrument lighter means mercury mercury rises miles motion move ounces piece pipe piston Plate 11 pounds pressure produced pump quantity of air quart quicksilver rain receiver red heat rise Rosneath round scale screw sound travels space specific gravity square steam steam-engine Stentor stop-cock striking suction suré surface syringe thermometer Thomas Savery thunder tion tube turn the handle vacuum valve vanes velocity vessel weather weight wind
Popularne fragmenty
Strona 189 - In that case the water is kept in the tube by the pressure of the atmosphere on the surface of the water into which it is plunged.
Strona 222 - ... them. Small pieces of alum and clay, mixed together, are made just large enough to enter at the wide end : they are then heated in the fire with the body whose heat is to be ascertained. The fire, according to its heat, contracts the earthy body, so that, being applied to the wide end of the gauge, jt will slide on towards the narrow end, less or more, according to the degree of heat to which it has been exposed*.
Strona 180 - 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.
Strona 248 - In foul weather, when the mercury rises much and high, and so continues for two or three days before the foul weather is quite over, then expect a continuance of fair weather to follow.
Strona 247 - 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.
Strona 247 - ... 1 . The rising of the mercury presages, in general, fair weather, and its falling foul •weather, as rain, snow, high winds, and storms. When the surface of the mercury is convex, or stands higher in the middle than at the sides, it is a sign...
Strona 160 - Savery to your aid ; Bade 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.
Strona 248 - ... 6. In fair weather when the mercury falls much and low, and thus continues for two or three days before the rain comes, then a deal of wet may be expected, and probably high winds.
Strona 249 - In winter, spring, and autumn, the sudden falling of the mercury, and that for a large space, denotes high winds and storms ; but in summer it presages heavy showers, and often thunder.