Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 616
piecea Fresnel, however, was the first who actu-ally constructed a lens on that principle, and fully a\ ailed himself of the ad\ antages \\ bich it affords;and lie has subdivided, with such judgment, the whole surface of the lens into a centre lens and concen-tric annular bands, and bas bo… … irrtijm*
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
