Report on Machinery and Processes of the Industrial Arts and Apparatus of the Exact SciencesVan Nostrand, 1869 - 669 páginas |
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Página 12
... hundred- and - fiftieth of one four - thousandth of an inch - that is to say , of one one- millionth part of an inch ; and to this degree of refinement it is Mr. Whitworth's belief that mechanical accuracy can be practically carried ...
... hundred- and - fiftieth of one four - thousandth of an inch - that is to say , of one one- millionth part of an inch ; and to this degree of refinement it is Mr. Whitworth's belief that mechanical accuracy can be practically carried ...
Página 15
... hundred times richer than she could possibly have been if she had possessed instead of them all the gold of California and all the diamonds of Brazil . But a century ago , just as Watt was turning over in his mind his first crude ...
... hundred times richer than she could possibly have been if she had possessed instead of them all the gold of California and all the diamonds of Brazil . But a century ago , just as Watt was turning over in his mind his first crude ...
Página 55
... hundred and fifty degrees from the vertical , the two pressures will balance ; and when the piston A reaches its lower limit , the piston B being then at the middle of its course , the inferior body of air will occupy half its normal ...
... hundred and fifty degrees from the vertical , the two pressures will balance ; and when the piston A reaches its lower limit , the piston B being then at the middle of its course , the inferior body of air will occupy half its normal ...
Página 62
... hundred cubic feet , would amount to seven and a half cents ; while six pounds of coal , which in a steam - engine would do the same work , costs less than two cents , coal being estimated at $ 6 per ton . In Paris gas costs but ...
... hundred cubic feet , would amount to seven and a half cents ; while six pounds of coal , which in a steam - engine would do the same work , costs less than two cents , coal being estimated at $ 6 per ton . In Paris gas costs but ...
Página 129
... hundred feet deep . No fraction of it can be turned to use with- out being first lifted perpendicularly upward through this great interval . For the most part , therefore , it has been allowed to run to waste . An attempt has been made ...
... hundred feet deep . No fraction of it can be turned to use with- out being first lifted perpendicularly upward through this great interval . For the most part , therefore , it has been allowed to run to waste . An attempt has been made ...
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advantage amount angle apparatus applied armature atmosphere axis Bessemer process boiler calories carried cent centimetres circumference compression construction contrivance crank cubic metres cylinder diameter direction discharge disk distance effect electric employed engine equal exhibited experiments Exposition extremity feet force furnace furnished glass half heat horizontal horse-power hundred hydraulic hydraulic head illustrated inches increased instrument introduced invention inventor iron kilograms kilometres latent heat length lever light light-houses liquid machine manufacture means mechanical ment Messrs metal metres millimetres mode motion movable types movement necessary object observed operation ordinary Paris passes piston plate position pounds practical present pressure prism produced pulley pump purpose refrigerator reservoir revolution roller rotary engine rotation screw sextant shaft side Siemens space spherometer steam steam-engine steel surface telescope temperature tion tonometer tube turbine turn valve vapor velocity vertical vessel weight wheel Wicklow Head
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Página 31 - B with the sound velocity where y is the ratio of the specific heat at constant pressure to the specific heat at constant volume, and p is the gas pressure.