Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 120
Fig. 177. How you see things in an opera glassFrom Lyndes Physics of the Household, published by The Macmillan Co. Experiment No. 120. An opera glass. Arrange the lenseson a piece of board as in Fig. 178. Focus on an object. Isthe image erect andare the lenses closertogether than in thetelescope ?… … 118 GILBERT BOY ENGINEERING
Light · Scientific recreations
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