Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 278
ecting lantern. — The projecting lantern consistsof a light-proof box, a source of bright light, a condensing lens,the lantern slide, and a projection lens. A bright light is produced by electricity, or gas, or, as in Fig.I93> by a lime light. The condenser consists of two large con-vex lenses.… … FIG. 193. — The projecting lantern. The eye. — A horizontal section of the human eye is shownin Fig. 194. The covering of the front of the eye is a trans-parent membrane c, called the cornea. Behind this is a clearliquid a, called the aqueous humor. The colored part of theeye is the iris, i. It is…
Physics · Home Economics
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