Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 47
Eays diverging from the farther extremity of one diameterof curvature of a double-convex lens, brought to a focus atthe same distance on the other side. the farther removed from the other side will be the point of con-vergence (Fig. 5), until, the point of divergence being at the centre,. Fig. 5. … Eays diverging from points more distant than the principalfocus of a double-convex lens on either side, brought to a focusbeyond it; the focus of convergence being within the diameterof curvature, if the focus of divergence be beyond it; and viceversd. KEFEACTION THROUGH CONVEX LENSES. 7 there is…
Microscopy · Biology
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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-237-146.webp)
