Machinery and Processes of the Industrial Arts: And Apparatus of the Exact SciencesU.S. Government Printing Office, 1869 - 669 páginas |
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Página 11
... practical limit to accuracy was very soon reached . The state of the mechanic arts in this respect at the time of Watt's invention is well illustrated by the historical fact that , for more than ten years , owing to the impossibility of ...
... practical limit to accuracy was very soon reached . The state of the mechanic arts in this respect at the time of Watt's invention is well illustrated by the historical fact that , for more than ten years , owing to the impossibility of ...
Página 12
... practical and very ingenious answer . Between the plane face of the standard inch and the extremity of the measuring screw opposed to it , he has introduced a little steel plate with parallel and perfectly true surfaces , from the two ...
... practical and very ingenious answer . Between the plane face of the standard inch and the extremity of the measuring screw opposed to it , he has introduced a little steel plate with parallel and perfectly true surfaces , from the two ...
Página 26
... practical limits which neither of these temperatures can transcend . Air - engines may be arranged in two classes , of which the first embraces those which draw their supplies directly from the atmosphere , and dis- charge them into the ...
... practical limits which neither of these temperatures can transcend . Air - engines may be arranged in two classes , of which the first embraces those which draw their supplies directly from the atmosphere , and dis- charge them into the ...
Página 32
... practical upper limit is imposed by the consideration that a red heat is reached for solids at about 650 ° C , which is 9230 ° C above the absolute zero . This limit could not be safely approached ; but supposing it to be actually ...
... practical upper limit is imposed by the consideration that a red heat is reached for solids at about 650 ° C , which is 9230 ° C above the absolute zero . This limit could not be safely approached ; but supposing it to be actually ...
Página 36
... practical account . If , again , at the end of the movement , the air could be immediately cooled without being discharged , the heat could be again applied and the effort repeated . But this not being practicable , the heated air may ...
... practical account . If , again , at the end of the movement , the air could be immediately cooled without being discharged , the heat could be again applied and the effort repeated . But this not being practicable , the heated air may ...
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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
Pasajes populares
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.