Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 64
tion of its refraction (this being/rom the densermedium, instead of i7ito it), antagonize each other; so that thesecond convex smface exerts an influence on the course of therays passing through it, which is almost exactly equivalent to i REFRACTION Br CONVEX LENSES. 41 that of the first. Hence the… … Parallel rays, falling on a double-convex lens, brought to a focusin its centre; conversely, rays diverging from that poiut, renderedparallel. 4. The distance of the focus-from the lens will depend, notmerely upon its degree of curvature, but also upon therefracting power of the substance of which…
Microscopy
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-232-141.webp)
