With the children on Sundays, through eye-gate, and ear-gate into the city of child-soul . Camera. 218 THE EYE, To illustrate my thought, I have to-day brought a camera.Sometimes such a camera as this is called a Kodak or Snap-shot.As the finest telescopes have been modeled after the human eye, sothe camera is only a very imperfect imitation of the human eye. Asthe spy-glass and telescope have lenses, so does this camera have alens, which you see here in the front. Just back of this lens is thedark chamber in the camera, and back of it is a ground glass, as youwill see here. Now whatever is di
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With the children on Sundays, through eye-gate, and ear-gate into the city of child-soul . Camera. 218 THE EYE, To illustrate my thought, I have to-day brought a camera.Sometimes such a camera as this is called a Kodak or Snap-shot.As the finest telescopes have been modeled after the human eye, sothe camera is only a very imperfect imitation of the human eye. Asthe spy-glass and telescope have lenses, so does this camera have alens, which you see here in the front. Just back of this lens is thedark chamber in the camera, and back of it is a ground glass, as youwill see here. Now whatever is directly in front of the camera isshown on the ground glass, as you will observe, but in an invertedor up-side-down position. So the eye has its various parts, and as. The Human Eye. the rays of light pass through this lens and reflect the picture on thisground glass, so rays of light coming from any object pass firstthrough the small opening of the eye, to the retina, where the pictureis inverted just the same as upon the ground glass. When this pic-ture is thrown upon the rear wall of the eye, which is called thqretina, the seeing nerve, which is called the optic nerve and is con-nected with the eye, conveys the impression to the brain, and theresult is what we call seeing. What I have told you is correct, and can easily be proven by a THE EYE. 219 simple experiment with the eye of some animal. If you take theeye of a dead rabbit, and cleanse the back portion of it from the fatand muscles and then hold a candle in front of it, you can see theimage of the candle formed upon the retina. If you take the eyeof an ox and carefully pare off from the back portion, so as to leaveit very thin, and place the eye in front of (or against) a small holemade in