Micrographia : containing practical essays on reflecting, solar, oxy-hydrogen gas microscopes; micrometers; eye-pieces, &c. &c. (1837)
Goring, C. R., 1792-1840, Pritchard, Andrew, 1804-1882, joint author · London : Whitaker and Co. · leaf 205
rays that can be taken up ; to accomplish whichwith a lens, the surface next the light should be concave, or atleast a piano, otherwise the rays nearest its margin will, owingto their great obliquity, be reflected from and not refracted 192 THE MICROGRAPHIA. through it. From the numerous… … first placed with its flat surface next the light, G, and at sucha distance from it as to bring the divergent rays nearly parallel ■>and then, in close connexion with it, a double convex lens, D,to condense them upon the object, B. In some instances Ihave used three plano-convex lenses, but I do…
Microscopy
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