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William A. Smith, DD. President of Randolph-Macon College , and Professor of Moral and Intellectual Philosophy., Lectures on the Philosophy and Practice of Slavery as exhibited in the Institution of Domestic Slavery in the United States: withe Duties of Masters to Slaves. 2 0 Browse Search
Henry Morton Stanley, Dorothy Stanley, The Autobiography of Sir Henry Morton Stanley 2 0 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
Margaret Fuller, Memoirs of Margaret Fuller Ossoli (ed. W. H. Channing) 2 0 Browse Search
Cambridge History of American Literature: volume 1, Colonial and Revolutionary Literature: Early National Literature: Part I (ed. Trent, William Peterfield, 1862-1939., Erskine, John, 1879-1951., Sherman, Stuart Pratt, 1881-1926., Van Doren, Carl, 1885-1950.) 1 1 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Helvetius or search for Helvetius in all documents.

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Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
the chisel cutting as the treadle descends; the pressure of the foot being relaxed, the spring-bar raises the treadle, running the work in the other direction. See lathe. Pole-mast. （Nautical.) A mast made with a single pole, in contradistinction to a mast built up, and secured by bands. Pol′e-mit. （Fabric.) A French camlet. Po-lem′o-scope. A glass with a mirror at an angle of 45°, designed to enable a person to view objects not directly before the eye. Invented by Helvetius. It is used in opera-glasses to view persons obliquely without apparently directing the glass at them. It is also used for viewing objects beyond an obstructing wall or bank, as in the interior of a fortress. See altiscope. Pole-pad. A pad of leather stuffed with wool and distended by an interior frame of iron, slipped and keyed on the end of the pole of a gun-carriage, to prevent injury to the horses. Pole-plate. （Carpentry.) The plate of a frame which supports t