Gilbert light experiments for boys . TO MAKE YOUR DARK ROOM Boys, you are going to makemany experiments with a beam ofsunlight let into a darkened room,so prepare for them now thor-oughly, as follows: Select in your home a roomwith only one window, facing thesouth or east or west. Now coverthis window so that no light canenter the room except through asmall slit. The best way to do Fig. 3. Shutter to darken room this is to make a solid wooden shut-ter, with tar paper on one side, tocover the whole window and makea slit in it three inches wide andtwo inches high. If the window istoo large for t
Gilbert light experiments for boys . TO MAKE YOUR DARK ROOM Boys, you are going to makemany experiments with a beam ofsunlight let into a darkened room,so prepare for them now thor-oughly, as follows: Select in your home a roomwith only one window, facing thesouth or east or west. Now coverthis window so that no light canenter the room except through asmall slit. The best way to do Fig. 3. Shutter to darken room this is to make a solid wooden shut-ter, with tar paper on one side, tocover the whole window and makea slit in it three inches wide andtwo inches high. If the window istoo large for this, make a woodenshutter (Fig. 3) for the lower partand cover the upper part with blackcloth, black paper, a quilt, a heavyblanket (Fig. 4), or anything thatwill shut out all light. Make theslit in the wooden part because youwill want to change the size and. Fig. 4. Shutter in window withother side showing and with card-board tacked over slit GILBERT LIGHT EXPERIMENTS 7 shape of the slit. To clo this you willmake slits of the right kind in blacktar paper or cardboard and then tackthese over the slit in the wooden shut-ter. Make the shutter so that you cantake it down and put it up quickly, be-cause you will want to experimentmany times and your mother will,probably, not want to leave the win-dow permanently darkened.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation
