Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 102
r. Fold a piece ofcardboard. Cut a four-pointedstar in one half. Fold thepoints back, make a tracing onthe other half, and cut out astar very carefully with thepoints exactly between thoseof the first. Arrange as shownin Fig. 152 and hold the redglass in front of one can-dle. Do you get an… … 100 GILBERT BOY ENGINEERING
Light · Scientific recreations
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
