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Updated: June 8, 2025
By surveying the path which the light takes from the illuminated surface of the outer objects via the pin-hole to the optical image inside the camera, we realize that the light-realm engaged in this process has the shape of a double cone, with its apex in the opening of the camera.
I beseech you, dear friends, do not think of His eye as the prisoner in a cell thinks of the pin-hole somewhere in the wall, through which a jailer's jealous inspection may at any moment be glaring in upon him, but think of Him your Brother, who 'knew what was in man, and who knows each man, and see in Christ the all-knowing Godhood that loves yet better than it knows, and beholds the hidden evils of men's hearts, in order that it may cleanse and forgive all which it beholds.
The crystal sphere still softly glowed, with intangible shadows flitting across its surface; the adept still sat cross-legged staring into its depths; opposite him, the cobra, its hood distended, swayed slowly to and fro. But as we stood there staring, a single delicate ray of sunlight coming through a pin-hole in the curtained window, struck the sphere and seemed to extinguish it.
When the first negative was brought forth, dripping, from the dark-room, it was without spot or stain, scratch or pin-hole; uniform in colour and of exactly the required density.
Focus a candle-flame or other object on the ground-glass plate of an ordinary photographic camera, and observe the small inverted image. Experiment 176. To illustrate spherical aberration. Make a pin-hole in a blackened piece of cardboard; look at a light placed at a greater distance than the normal distance of accommodation. One will see a radiate figure with four to eight radii.
It seemed probable that it might have been constructed with a view to providing a means of escape, should the palace ever be attacked and stormed. That they were correct in their surmise was proved shortly afterward when, a little distance ahead, Frobisher caught sight of a pin-hole of light.
"Yes, that has been my lot," was the reply; and she leaned back in the gold-trimmed cane chair, her feet still in the belt of sunlight. "I have often wished that I might travel over the ocean," said Ruth, "but here I remain what shall I say? a rustic in a bandbox, seeing the world through a pin-hole. That is the way my father puts it.
How could she, how ever could she be left to do such a thing! What would the obsequious, admiring gallants she had left in her parlor say if they but knew what that little pin-hole in her curtain reminded her of?
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