ays slightly divergent or convergent; each of the oth- Theoretically, reflection alone has an indefinite application, er points of the flame likewise gives some rays parallel, the rior profiles of segments of these cones on the base. Suppose now that these profiles 1 a, 2 6, 3 c, etc., repre- since… … BALESTRIERI'S SYSTEM OF ILLUMINATION. f ul effect of the reflec- for example, of a flash tor. Such is the pro- light, for lenses of 1 blem which, it appears, has been successfully solved by Pro sent metallic segments with polished surfaces. The ray of meter, turning around a lamp, C (Fig. 5), O C +…
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