Journal of the Franklin Institute

Franklin Institute, 1839
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415]

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Seite 242 - Be it known that I, John Fitch, of Philadelphia, in the county of Philadelphia, the State of Pennsylvania, have invented a new and improved mode of preventing steam-boilers from bursting, and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.
Seite 91 - 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.
Seite 239 - I now declare that what I claim as my invention, and wish to secure by letters patent, is the...
Seite 408 - He states that the cases of disease on the dark side of an extensive barrack at St. Petersburg have been uniformly for many years in the proportion of three to one to those on the side exposed to strong light.
Seite 241 - Having thus described the nature of my invention, and the manner of performing the same, I would have it understood that I do not confine myself to the...
Seite 61 - The metal is a combination of copper and zinc, the best admixture being found to be 60 per cent, of the former and 40 per cent, of the latter. The...
Seite 144 - Thus proving beyond a doubt, that in land-spouts the wind blows towards the centre of the spout. How is it at sea? In several great storms in the United States, of several hundred miles in diameter, which have been investigated with great care by the Joint Committee of the American Philosophical Society and the Franklin Institute...
Seite 259 - Light : this shows that the attempt to give it sensibility has been carried" too far. The object is to approach to this condition as near as possible, without reaching it, so that the substance may be in a state ready to yield to the slightest extraneous force, such as the feeble impact of the violet rays when much attenuated.
Seite 107 - Having thus described the nature of our invention, and the manner in which the same is to be performed, we would remark, that although we have...
Seite 93 - What we claim as our invention and desire to secure by Letters Patent is the...

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