Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 108
ExperimentNo. 59, but light the match by means of the short focus lens(Fig. 161). THE WHY OF IT When the parallel waves from the sun fall on a converginglens, which is thicker at the middle than at the edges (Fig. 162), the portions of thewaves that go throughthe thick part areslowed up more… … 106 GILBERT BOY ENGINEERING
Light · Scientific recreations
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