Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 84
Sections of Prisms. combinations of curves can be made, some of whichappear in Fig. 26. The action of such lenses upon the light proceed-ing from any source may now be considered. If thereis a parallel beam proceeding from a lamp, or from thesun, and it falls on the form of lens, called a… … Fig. 24.—Front View ami Section of a Double Convex Lens. in the reverse manner and turns the light up, and thesides act in a similar manner ; and as the inclination
Astronomy · Telescopes
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