Gilbert light experiments for boys . postcard lantern here, by a limelight,is converged on thelantern slide by thecondensing lens andan image of the in-verted slide is thrownon the screen by theprojecting lens. The Postcard Lan-tern consists of alight-proof box, twoelectric lights whichthrow light on the postcard but not directly on the lens, apostcard slide, and a converging lens which throws an imageof the postcard on the screen. Experiment No. 122. Magic-lantern shows. Place 4-inchlens in ring holder in a hole in a large piece of cardboard, placea black book 6 inches from lens and a white s
Gilbert light experiments for boys . postcard lantern here, by a limelight,is converged on thelantern slide by thecondensing lens andan image of the in-verted slide is thrownon the screen by theprojecting lens. The Postcard Lan-tern consists of alight-proof box, twoelectric lights whichthrow light on the postcard but not directly on the lens, apostcard slide, and a converging lens which throws an imageof the postcard on the screen. Experiment No. 122. Magic-lantern shows. Place 4-inchlens in ring holder in a hole in a large piece 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 have lots of funwith a lantern made asfollows: Get a cardboard orwooden box (Fig. 181)about 8 X 6 X 6,put the 8-inch lens inring holder and in a Fig. 182, You hold a magic-lantern show wrapping paper tube. 120 GILBERT BOY ENGINEERING A, a
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation
