Journal of the Franklin Institute, Band 39;Band 69

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Pergamon Press, 1860
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-59.
 

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Seite 385 - Table of the corrections for temperature to reduce observations to 32° Fahrenheit for Barometers with brass scales extending from the cistern to the top of the mercurial column.
Seite 52 - ... occurred in vertical planes, splitting up the specimen in all directions; cracks were noticed to form some time before the specimen finally gave way ; then these rapidly increased in number, splitting the glass into innumerable irregular prisms of the same height as the cube; finally, these bent or broke, and the pressure, no longer bedded on a firm surface, destroyed the specimen.
Seite 129 - 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 62 - RAILWAY MACHINERY ; A Treatise on the Mechanical Engineering of Railways ; embracing the Principles and Construction of Rolling and Fixed Plant, in all departments. Illustrated by a Series of Plates on a large scale, and by numerous Engravings on Wood. By DK CLARK, Engineer. 2 vols. half-morocco, folio, $24. " This work contains the best published information extant upon locomotives.
Seite 287 - ... can be usefully employed ; ranging in weight from ten to thirty-six tons, and using onehalf, two-thirds, three-fourths, or the whole weight for adhesion, as the grade of the road, or business to be done, may render desirable or necessary. Patterns of various sizes of each of the following plans, viz: Plan A and B, 1 pair drivers and trucks, for Passenger business exclusively.
Seite 70 - HAMMEB, now so generally introduced into this and other countries, of which they are the assignees and sole Agents for the United States. Up to the present time there have been made by the Patentees in England, for that country and the Continent of Europe, between two hundred and fifty and three hundred hammers, for Government, Railway...
Seite 261 - ... phenomena of fluorescence or phosphorescence disappeared at once. The wonderfully rapid manner in which the nitrate of uranium received the action of the light within the box, and threw off its phosphorescence outside, was beautifully shown. The electric light, even when the discharge is in rarefied media, or as a feeble brush, emits a great abundance of those rays, which produce the phenomena of fluorescence ; but then if these rays have to pass through common glass they are cut off, being absorbed...
Seite 183 - ... which was retained in the vessel, and assisted in purifying the metal. The increase of temperature which the metal underwent, and which seemed so disproportionate to the quantity of carbon and iron consumed, was doubtless owing to the favorable circumstances under which combustion took place.
Seite 65 - 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 214 - 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...

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