Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 103
100 GILBERT BOY ENGINEERING … Fig. 153. Trench faces Experiment No. 97. A ghost party. Mix a half teaspoonfnlof salt in three or four teaspoonfuls of alcohol in a saucer, standthe saucer on a cup on the table (to prevent burning the table), GILBERT LIGHT EXPERIMENTS 101 seat the party around the table in the dark, light the…
Light · Scientific recreations
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