No. 74-180 water lens, mounted as illustrated 5 25 74-225 MOUNTED HOLLOW DOUBLE CONVEX LENS. This is our No. 74-182 water lens,' mounted as illustrated above 5.25 No. 74-230 No. 74-235 74-230 READING LENS. This is a double convex lens, mounted in a metal frame and provided with handle. Diameter of… … No. 74-240 7i-240 KUEHNE'S EYE MODEL, for the demonstration and study of the optical construction of the eye, its normal and abnormal condition and the necessary corrections. The apparatus consists of a water-tight rectangular box with various accessories such as the two corneas, one of which is…
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