Journal of the Franklin Institute

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 143 - 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 126 - Ib. of coal, has been shown to be 150'35 cubic feet, of which 44~64 enter into combination with the gases, and 105'71 with the solid portion of the coal. From the chemical changes which take place in the combination of the hydrogen with oxygen, the bulk of the products is found to be to the bulk...
Seite 360 - The intensity of the blow may be modified instantly by the attendant, so as to suit /he work; and the Ram may in like manner be arrested in its descent at any point, so that it is more completely under control than any other form known. 3d, It may be adapted to any description of work, whether for hammering...
Seite 408 - After referring to the rapid progress in submarine telegraphy which the last four years have witnessed, Mr. Whitehouse said that he regarded it as an established fact, that the nautical and engineering difficulties which at first existed had been already overcome, and that the experience gained in submerging the shorter lengths had enabled the projectors to provide for all contingencies affecting the greater.
Seite 216 - THE subscriber would respectfully inform his friends and the public, that he continues to give instruction in MACHINE, ARCHITECTURAL, TOPOGRAPHICAL, and LANDSCAPE DRAWING, and PAINTING in OIL and WATER COLORS. Day and Evening Classes at the office, and instructions given in Schoolsand Families.
Seite 47 - We had found that 34,000 Ibs. to the square inch was the ultimate strength of boilers having their joints crossed and soundly riveted. Flat surfaces, frequently essential, were not so objectionable with respect to strength as they appeared to be at first sight, but when properly stayed, were the strongest part of the construction. This was proved by the result of experiments made on the occasion of a recent bursting of a boiler.

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