Gilbert light experiments for boys . Screen, and if now you Fig. 184. You illustrate the camera GILBERT LIGHT EXPERIMENTS 121. Fig. 185. The camera obscura hold postcards, drawings,and other small objectsupside down against thebook, the lens will throwerect and enlarged imageson the screen, and yourshow is on. The PhotographicCamera is simply a light-proof box with a converg-ing lens in one side anda plate holder in theother. The lens L () throws an invertedimage ba of the objectAB on the plate S. Experiment No. illustrate the camera. Put your converging lenses in turn ina ring h

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Gilbert light experiments for boys . Screen, and if now you Fig. 184. You illustrate the camera GILBERT LIGHT EXPERIMENTS 121. Fig. 185. The camera obscura hold postcards, drawings,and other small objectsupside down against thebook, the lens will throwerect and enlarged imageson the screen, and yourshow is on. The PhotographicCamera is simply a light-proof box with a converg-ing lens in one side anda plate holder in theother. The lens L () throws an invertedimage ba of the objectAB on the plate S. Experiment No. illustrate the camera. Put your converging lenses in turn ina ring holder, and put the holder in a hole in one end of a card-board box (Fig. 184). Cover the box and your head with a darkcloth and move the screen back and forth until you get a picture. The CameraObscura()has a combinedlens and reflectingprism at the topwhich throws apicture down onthe table in frontof the artist. E x p e r i mentNo. 126. To make Fig. 186. You make a camera obscura a Camera ob-

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation