Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 614
describes the apparatusused in the four light-houses built at Liverpool in 1763. These reflectors were formed to a paraboliccurve by a somewhat rude process, which he describes. Figs. 3290 and 3291 represent tlie parabolic reflectors used in the Liverpool light-houses, copied from, plate in…
Mechanical engineering · Mechanics · Engineering
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