Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 80
119. RM is throe-fourths of IM inwater and two-thirds of IM in glassFrom Lyndes Physics of the House-hold, published by The Macrnillan Co. FUN BY DAY OR NIGHTExperiment No. 68. Magic lead pencil. Put a pencil ina glass of water in a slanting direction and sight along it (Fig. 120). Does it appear… … 78 GILBERT BOY ENGINEERING
Light · Scientific recreations
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