The Popular Science Review: A Quarterly Miscellany of Entertaining and Instructive Articles on Scientific Subjects, Volume 12James Samuelson, Henry Lawson, William Sweetland Dallas Robert Hardwicke, 1873 |
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Página 5
... present steamers , and will be propelled at a speed of twenty miles per hour , by two pairs of engines of the collective power of 4,600 horses . The centres of the two pairs of paddle - wheels will be 106 ft . apart . " The great ...
... present steamers , and will be propelled at a speed of twenty miles per hour , by two pairs of engines of the collective power of 4,600 horses . The centres of the two pairs of paddle - wheels will be 106 ft . apart . " The great ...
Página 8
... present . The invention of springs has not entirely cured the shaking of a carriage ; but I believe that the comparison of the motion in the Bessemer saloon with that in the present boats , in a rough sea , will be much the same in ...
... present . The invention of springs has not entirely cured the shaking of a carriage ; but I believe that the comparison of the motion in the Bessemer saloon with that in the present boats , in a rough sea , will be much the same in ...
Página 14
... present source of danger to the coal - miner , and of the methods which have been suggested for guarding against it ; to point out where these methods have succeeded , and where they have failed ; and to add a few hints as to how ...
... present source of danger to the coal - miner , and of the methods which have been suggested for guarding against it ; to point out where these methods have succeeded , and where they have failed ; and to add a few hints as to how ...
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... present custom looks upon it as safe to employ naked lights . The reader will now realise the danger which the collier stands always face to face with : gas to some extent is almost always present , and should it be mixed with air in ...
... present custom looks upon it as safe to employ naked lights . The reader will now realise the danger which the collier stands always face to face with : gas to some extent is almost always present , and should it be mixed with air in ...
Página 23
... present , the flame elongates and takes a pale bluish hue , till the gas is present in quantity enough to cause explosion within the gauze . These indications enable a trained eye to estimate to a very fair degree of approxi- mation the ...
... present , the flame elongates and takes a pale bluish hue , till the gas is present in quantity enough to cause explosion within the gauze . These indications enable a trained eye to estimate to a very fair degree of approxi- mation the ...
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