Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 83
80 GILBERT BOY ENGINEERING … Fig. 124. A broken mirror How Deep is the Water? If you have gone swimming invery clear water you know that it always looks shallower thanit is. If the water is at the same depth everywhere it will lookto you shallower in the distance, for the reasons givenabove. How Tall are You to a Fish? If you…
Light · Scientific recreations
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