Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 122
of cardboard, placea black book 6 inches from lens and a white screen 12 inchesfrom lens on the other side, light the candles, and hold smallobjects against the book. Are their images thrown on thescreen in natural colors and magnified twice? ExperimentNo. 123. To make apostcard lantern. Youcan… … 120 GILBERT BOY ENGINEERING A, a
Light · Scientific recreations
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
