Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 566
ASSOCIATION OF ENGINEERING SOCIETIES. 5:20 ILLUMINATION. It is a long step from the illumination in 1673 of the beacon on Point Allerton at the entrance to Boston Harbor, by "fier bales of pitch and ocum" burned in open braziers, to the perfected fountain lamps and the first order lens apparatus of… … SIXTH ORDER LENS. was first lighted by tallow candles, then followed the spider lanrp, burning fish oil, and in 1812 Mr. Wiuslow Lewis's patent magnifying and reflecting lantern. The reflectors were gradually improved and the magnifiers done away with. When the Light-House Board took coutrol in…
Engineering
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