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 7
... weight , and perhaps a less proportion still of the bulk ; so that the greater portion of the expense of transportation is paid for the moving of substances which are not only useless , but which must be got rid of before the remainder ...
... weight , and perhaps a less proportion still of the bulk ; so that the greater portion of the expense of transportation is paid for the moving of substances which are not only useless , but which must be got rid of before the remainder ...
Página 11
... weight of the mass to be operated on more considerable , the difficulties of the task were proportionally increased ; so that a practical limit to accuracy was very soon reached . The state of the mechanic arts in this respect at the ...
... weight of the mass to be operated on more considerable , the difficulties of the task were proportionally increased ; so that a practical limit to accuracy was very soon reached . The state of the mechanic arts in this respect at the ...
Página 14
... weight were very much greater . The extreme mechanical accuracy which the examples above described serve to illustrate , has been a consequence of the introduction into mechanical art of machine tools ; and machine tools have owed ...
... weight were very much greater . The extreme mechanical accuracy which the examples above described serve to illustrate , has been a consequence of the introduction into mechanical art of machine tools ; and machine tools have owed ...
Página 25
... weight necessary to the production of a given power as to have made the introduction of the movable engine into agriculture and into many of the minor industries economical , and not too inconvenient . Yet , for intermittent industries ...
... weight necessary to the production of a given power as to have made the introduction of the movable engine into agriculture and into many of the minor industries economical , and not too inconvenient . Yet , for intermittent industries ...
Página 26
... weight which the use of the boiler necessitates , and unembarrassed by its bulk . As yet , however , this condition has not been realized , and hence the dimensions of the working parts of air- engines are necessarily so much more ...
... weight which the use of the boiler necessitates , and unembarrassed by its bulk . As yet , however , this condition has not been realized , and hence the dimensions of the working parts of air- engines are necessarily so much more ...
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Términos y frases comunes
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.