Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 35
Fig. 6.—Convex and concavelenses are related to theprism. Fig. 7.—Proof that a lens may be consideredas an assemblage of prisms. (From the Forces of Nature.) shaded parts its relation to a pair of prisms. The fact that a lens is,in effect, as such, but an assemblage of superposed prisms is seen…
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![An illustration from The English pilot. [cartographic material] : The fourth book. Describing The West-India navigation, from Hudson's Bay to the River Amazones. Particularly delineating The Sea Coasts, Capes, Headlands, Rivers, Bays, Roads, Havens, Harbours, Streights, Rocks, Sands, Shoals, Banks, Depths of Water, and Anchorage, with all the Islands therein, as Jamaica, Cuba, Hispaniola, Barbadoes, Antigua, Bermudas, Porto Rico, and the rest of the Caribbee and Bahama Islands. Also, A new Description of Newfoundland, New England, New York, East and West New- Jersey, Dellawar Bay, Virginia, Maryland, Carolina. showing, The Courses and Distances from one Place to another; the Ebbing and Flowing of the Sea, the Setting of the Tides and Currents, &c. With many other Things necessary to be known in Navigation. (1775)](https://img.insideoutlibrary.com/img/200/ia-englishpilotcart00thor-20-134.webp)
