Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 619
inches. The optical combination is not the best thatcan be devised, but it answers a very good purpose. The lamp has a kerosene burner of approved t3pe, and isprovided with a tall chimney, which insures perfect combus-tion and a white light. The reservoir of the lamp, as well asthe objective tube… … Vertical Atlachment. It is not intended to treat of the projection of pictureswith this instrument; but it may be said, in passing, thatthe lantern, when altered as suggested, projects a verygood picture, five or six feet in diameter. A little camphoradded to the kerosene increases the light…
Physics · Lantern projection · Electric apparatus and appliances
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