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The Daily Dispatch: December 21, 1865., [Electronic resource] 22 0 Browse Search
James Parton, Horace Greeley, T. W. Higginson, J. S. C. Abbott, E. M. Hoppin, William Winter, Theodore Tilton, Fanny Fern, Grace Greenwood, Mrs. E. C. Stanton, Women of the age; being natives of the lives and deeds of the most prominent women of the present gentlemen 6 2 Browse Search
Henry Morton Stanley, Dorothy Stanley, The Autobiography of Sir Henry Morton Stanley 5 1 Browse Search
The Daily Dispatch: September 29, 1864., [Electronic resource] 4 0 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 4 0 Browse Search
Thomas Wentworth Higginson, Henry Wadsworth Longfellow 3 1 Browse Search
Thomas Wentworth Higginson, Atlantic Essays 2 0 Browse Search
Brigadier-General Ellison Capers, Confederate Military History, a library of Confederate States Military History: Volume 5, South Carolina (ed. Clement Anselm Evans) 2 0 Browse Search
Oliver Otis Howard, Autobiography of Oliver Otis Howard, major general , United States army : volume 2 2 0 Browse Search
Waitt, Ernest Linden, History of the Nineteenth regiment, Massachusetts volunteer infantry , 1861-1865 2 0 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Leopold or search for Leopold in all documents.

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Knight's Mechanical Encyclopedia (ed. Knight), D. (search)
aper 27 × 42 inches. Doub′le steam-en′gine. A steam-engine which has two cylinders acting coincidently or alternately. Two double-acting oscillating cylinders, acting upon a two-cranked shaft, work coincidently, and form a double-engine. Leopold's engine, about the middle of the last century, was a double-engine, a duplication of the Newcomen atmospheric-engine. It had two cylinders, each working its own pump, and operating alternately. The double steam-engine (Leopold's) preceded theLeopold's) preceded the double-acting (Watt's)-See double-cylinder steam-engine; duplex steam-engine. Doub′let. 1. (Optics.) An arrangement of lenses in pairs, invented by Wollaston. It consists of two plano-convex lenses having their focal lengths in the proportion of one to three, or nearly so, and placed at a distance determinable by experiment. Their curved sides are placed towards the eye, and the lens of shortest focal length towards the object. It is a reversal of the Huyghenian eye-piece, and it