Journal of the Franklin InstitutePergamon Press, 1854 |
Contents
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adjustable American apparatus applied Assignor Atrato attached battery beam boilers bottom brake burner carriage cast iron cells centre chamber City claim the arrangement claim the combination Claim.-"I claim Claim."I coal combustion connected connexion construction cutters cylinder deflexion diameter distance draft equivalent evaporation experiments feet flanch flues force frame Franklin Institute furnace G. D. Coleman gases groove hammer heat invention Journal length lever line shaft Machinery manufacture Massachusetts means mechanical metal miles mode motion mould needle operating ordinary paddle pass Patent Office Pennsylvania Philadelphia Philadelphia Gas piece Pierce Butler pipe piston placed plate pounds pressure produced pump purpose quantity Quibdó Railroad Review revolutions per minute rollers San Juan San Pablo screw shaft side slide spring steam engine substantially as described surface temperature tons truss rods tube valve vessel weight wheel wire wrought iron York
Popular passages
Page 68 - The Committee on Science and the Arts constituted by the Franklin Institute of the State of Pennsylvania, for the promotion of the Mechanic Arts, to whom was referred for examination a Solar Compass, invented by WM.
Page 58 - This line of deep-sea soundings seems to be decisive of the question as to the practicability of a submarine telegraph between the two continents, in so far as the bottom of the deep sea is concerned.
Page 59 - ... the inference that these depths of the sea are not disturbed either by waves or currents. Consequently, a telegraphic wire once laid there, there it would remain, as completely beyond the reach of accident as it would be if buried in air-tight cases. Therefore, so far as the bottom of the deep sea between Newfoundland, or the North Cape, at the mouth of the St. Lawrence, and Ireland, is concerned, the practicability of a submarine telegraph across the Atlantic is proved.
Page 62 - ... dynamic relations of electricity ; every current where there is resistance, has the static element and induction involved in it, whilst every case of insulation has more or less of the dynamic element and conduction ; and we have seen that with 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.
Page 59 - I was to learn that all these specimens of deep-sea soundings are filled with microscopic shells ; to use his own words, " not a particle of sand or gravel exists in them." These little shells, therefore, suggest the fact that there 'are no currents at the bottom of the sea whence they came — that...
Page 409 - These two plaster moulds may be called the " waste blocks," as they are not used in producing the moulds for casting, but are subsequently destroyed. Reversed moulds, in plaster, are now made from these waste blocks (the pattern being first removed), by placing upon the bottom box a second top box, an exact duplicate of the former top box, and filling it up with plaster (having used clay-wash as before), and doing the same with the other box. Reversed moulds are thus obtained, from which the final...
Page 144 - The Committee on Science and the Arts, constituted by the Franklin Institute of the State of Pennsylvania for the promotion of the Mechanic Arts, to whom was referred for examination, two reflecting telescopes, made by Mr.
Page 72 - Exchanges which it possesses, enables it to give to its readers early information as to any improvements, or discoveries made in any part of Europe, while it ensures to articles published in its pages, a wide circulation in those Countries of the Old World in which Mechanic Arts and Manufactures prosper.
Page 411 - ... and the rest of the space at the back filled with plaster as usual. In practice it is more convenient generally to reverse the mode of running this metal for the face of the mould, by first ramming the box, when prepared for the plaster, full of sand, then lifting it off, and paring...