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Cambridge History of American Literature: volume 3 (ed. Trent, William Peterfield, 1862-1939., Erskine, John, 1879-1951., Sherman, Stuart Pratt, 1881-1926., Van Doren, Carl, 1885-1950.) 6 0 Browse Search
Harper's Encyclopedia of United States History (ed. Benson Lossing) 2 0 Browse Search
Thomas Wentworth Higginson, Margaret Fuller Ossoli 2 0 Browse Search
Edward L. Pierce, Memoir and letters of Charles Sumner: volume 1 2 0 Browse Search
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Browsing named entities in Harper's Encyclopedia of United States History (ed. Benson Lossing). You can also browse the collection for Malthus or search for Malthus in all documents.

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Harper's Encyclopedia of United States History (ed. Benson Lossing), Engineering. (search)
nufacture of soda, bleaching powders, aniline dyes, and other products of the distillation of coal, also coal-oil from petroleum, acetylene gas, celluloid, rubber goods in all their numerous varieties, high explosives, cement, artificial manures, artificial ice, beet-sugar, and even beer may now be included. The value of our mechanical and chemical products is great, but it is surpassed by that of food products. If these did not keep pace with the increase of population, the theories of Malthus would be true—but he never saw a modern reaper. The steam-plough was invented in England some fifty years since, but the great use of agricultural machinery dates from our Civil War, when so many men were taken from agriculture. It became necessary to fill their places with machinery. Without tracing the steps which have led to it, we may say that the common type is what is called the binder, and is a machine drawn chiefly by animals, and in some cases by a field locomotive. It cut