The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 418
MM!\ iiiiliii \r.rgfd\ Mil 1 j … that a lens, or set of lenses, might be built of separate pieces of glass. In1819, the late M. Fresnel proposed that the generating sections of the ringsnot only ought not to have the same centre, but even that the differentcentres should not be situated on the same axis of the lens. A few…
Architecture · Civil engineering · Science
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