Journal of the Franklin Institute, Band 65

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Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-59. Cf. Index to v. 1-120 of the Journal, p. [415]
 

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Seite 277 - I \ ft., to 6 tons, falling 6 feet. They can, therefore, confidently urge its merits upon the trade, and are provided with certificates in its favor from many parties, (who have one or more in use,) which will be shown upon application.
Seite 139 - 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.
Seite 338 - Method of Calculating the Cubic Contents of Excavations and Embankments by the Aid of Diagrams 8vo, 2 00 Webb's Economics of Railroad Construction Large 12mo, 2 50 Railroad Construction 16mo, mor.
Seite 326 - If he be the original inventor of the device or machine called the divider, he will have a right to treat as infringers all who make dividers operating on the same principle, and performing the same functions by analogous means or equivalent combinations, even though the infringing machine may be an improvement of the original, and patentable as such.
Seite 287 - Hodgkinson on the breaking weight of inch bars of ten different descriptions of iron, where the tensile strength was ascertained by direct experiment, it would appear that the ratio between the resistance of tension and the resistance of flexure varies in different qualities of metal, an inference which seems to be confirmed by other experiments on rectangular bars given in the Report of the Commissioners on the application of iron to railway structures.
Seite 342 - ... ensures to articles published in its pages, a wide circulation in those Countries of the Old World in which Mechanic Arts and Manufactures prosper. Among its correspondents will be found many of the most distinguished...
Seite 182 - What I claim as my improvement in furnaces for burning bagasse and other fuels too wet to be conveniently burned in the usual way and well known ways, is : " First, the combination of two chambers, the one above the other, and separated by a grate, the lower one for the combustion of any known dry carbonaceous fuel, and the upper one in immediate proximity therewith to receive heat therefrom for heating and drying the charge of wet fuel, with a mixing chamber, into which both continuously and simultaneously...
Seite 203 - These facts have a certain bearing on a geological question — namely, the transmission of heat from the interior of the earth to the crust. The oolite, for instance, conducts heat much better than the chalk, the sandstone better than the oolite, the igneous rock better than the sandstone, and in all cases the rock charged with moisture better than the dry rock. But Mr Hopkins would have added to the value of his paper if he had ascertained by experiment the quantity of water absorbed by each rock...
Seite 133 - That it is obvious that there is a culminating point in the development of the sugar in the cane, which is the best time for sugar making. This point or season I consider to be, when most if not all the seeds are ripe, and after several frosts, say when the temperature falls to 25° or 30° F.

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