The Annual of Scientific Discovery, Or, Year-book of Facts in Science and ArtGould and Lincoln, 1855 |
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Pagina 21
... amount of skill in handling it , which they find abundant leisure to improve in the early times of their practice . " There are now many good instruments among us in the hands of those who know how to use them , and many of the highest ...
... amount of skill in handling it , which they find abundant leisure to improve in the early times of their practice . " There are now many good instruments among us in the hands of those who know how to use them , and many of the highest ...
Pagina 38
... amount of bevel are capable of effecting the most delicate gradation from one end of the stick to the other ; and in this respect , as indeed in every other , the work of the machine exceeds in accuracy that of the ordinary tools ...
... amount of bevel are capable of effecting the most delicate gradation from one end of the stick to the other ; and in this respect , as indeed in every other , the work of the machine exceeds in accuracy that of the ordinary tools ...
Pagina 44
... amount of steam , and the fire - box not being subjected to that violent heat , which has been the real difficulty with other engines for burning anthracite , is preserved , while it has been burned out in all other engines in a few ...
... amount of steam , and the fire - box not being subjected to that violent heat , which has been the real difficulty with other engines for burning anthracite , is preserved , while it has been burned out in all other engines in a few ...
Pagina 50
... amount of daily work and the same water , sixty pounds of scale had deposited . In both cases , the de- posit was more upon the sides than upon the bottom of the boiler , and much less than without the use of sal ammoniac . Mixture of ...
... amount of daily work and the same water , sixty pounds of scale had deposited . In both cases , the de- posit was more upon the sides than upon the bottom of the boiler , and much less than without the use of sal ammoniac . Mixture of ...
Pagina 51
... amount of the tension of the wire can be obtained , while the peculiar form of the truss - beam will cause any weight that may be brought on any part of the bridge , to communicate to all parts of the span . IMPROVEMENT IN COMMUNICATING ...
... amount of the tension of the wire can be obtained , while the peculiar form of the truss - beam will cause any weight that may be brought on any part of the bridge , to communicate to all parts of the span . IMPROVEMENT IN COMMUNICATING ...
Overige edities - Alles bekijken
The Annual of Scientific Discovery, Or, Year-book of Facts in ..., Volume 5 Volledige weergave - 1854 |
The Annual of Scientific Discovery, Or, Year-book of Facts in ..., Volume 5 Volledige weergave - 1854 |
The Annual of Scientific Discovery, Or, Year-book of Facts in Science and Art Volledige weergave - 1857 |
Veelvoorkomende woorden en zinsdelen
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Populaire passages
Pagina 165 - ... the same voltaic source, the same current in the same length of the same wire, gives a different result as the intensity is made to vary, with variations of the induction around the wire. The idea of intensity or the power of overcoming resistance, is as necessary to that of electricity, either static or current, as the idea of pressure is to steam in a boiler, or to air passing through apertures or tubes ; and we must have language competent to express these conditions and these ideas.
Pagina 228 - The natural excitation of osmose in the substance of the membranes or cell-walls dividing such solutions seems, therefore, almost inevitable. In osmose there is, further, a remarkably direct substitution of one of the great forces of Nature by its equivalent in another force — the conversion, as it may be said, of chemical affinity into mechanical power. Now, what is...
Pagina 165 - The production of a polarized state of the particles of neighboring matters by an excited body, constitutes induction, and this arises from its action upon the particles in immediate contact with it, which again act upon those contiguous to them, and thus the forces are transferred to a distance. If the induction remain undiminished, then perfect insulation is the consequence ; and the higher the polarized condition which the particles can acquire or maintain, the higher is the intensity which may...
Pagina 348 - Nymphaa alba, though it may be larger; nor is it so abundant an ornament of the tropical waters as the latter is of ours. But the question is not to be decided by a comparison of individual plants, or the effects they may produce in the landscape, but on the frequency with which they occur, and the proportion the brilliantly coloured bear to the inconspicuous plants.