Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 89
n order to render the image again clear; GG STARGAZING : PAST AND PRESENT. [book II. hence the place of the focus depends on the distance ofthe object, and the candle and its image must correspondto two conjugate foci. If now rays be passed from the lantern or sun througha concave lens, Fig. 31,… … Fig. 32.—Horizontal Section of the Eyeball. Sd, the sclerotic coat ; Cn, thecornea ; It, the attachments of the tendons of the recti mnscles ; Ch, thechoroid ; Cj), the ciliary processes ; Cm, the ciliary mnscle ; Ir, the iris ;Aq, the aqueous humour ; Cnj, the crystalline lens ; Vi, the…
Astronomy · Telescopes
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