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قراءة كتاب Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures

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Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880
A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures

Scientific American, Vol. XLIII.—No. 1. [New Series.], July 3, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures

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دار النشر: Project Gutenberg
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href="@public@vhost@g@gutenberg@html@files@38482@[email protected]#art36" class="pginternal" tag="{http://www.w3.org/1999/xhtml}a">Inventions, engineering

10 24 Inventions, mechanical 7 12 Inventions, miscellaneous 4 42 Inventions, new 11 9 Iron, effect of age on quality 3 15 Lamp, electric, improved* 5 23 Leadville mines and railroads* 6 34 Magnets, corn 10 35 Materials, resistance of, exp. on 10 3 Maxim's gas machine* 1 24 Mechanical inventions 7 31 Natural history notes 7 8 Navigation in fogs* 3 7 Oil tanks, cannonading of 3 18 Ore separator, Edison 5 41 Photoglyptic process, new 11 26 Phyllirhoe Bucephala* 7 32 Ruggles, S. P 7 22 Shower bath, portable, new* 6 19 Slate washer, novel* 5 2 Specimen, rare, lost 1 5 Steamer, little, remarkable 2 10 Steamers, large, collision between 3 21 Stevens Institute of Technology 5 33 Sydney Industrial Exhibition* 8 28 Tree growth, force of* 7 27 Trees and shrubs, care of 7 19 Washer, slate, novel* 5 4 Watches, Am., superiority of 2 14 Watering dipper, improved* 5






AGRICULTURAL INVENTIONS.

Mr. Sterling A. Millard, of Clayville, N. Y., has invented a scythe blade that contains much less weight of metal and possesses equal or greater strength than the ordinary scythe blades. It is made in the usual manner from what is termed by scythe makers a "scythe rod," and is wrought and shaped in such form that a proper thickness is left to serve as the back of the blade. A longitudinal auxiliary rib or supplementary back is formed on the blade, which stiffens the scythe without requiring the same weight of metal as those of the usual construction.

Mr. George C. Winslow, of Kalamazoo, Mich., has patented an improvement in spring harrow teeth, which consists generally in hinging the harrow tooth in the forward end of a rectangular frame bolted to the harrow bar, and combining

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