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The first thing, then, is to lay a sensitive coating on a piece of glass, -- crown-glass, which has a natural surface, being preferable to plate-glass.
The best eight by ten crown-glass "was regularly imported," and also "beautiful assortments of fashionable coat and vest buttons," as well as "brown and loaf sugar, coffee, chocolate, tea, and spices."
Imagine a man five times as sensitive as a young lady in her first season, with the will of a Titan, and a mind like a crown-glass mirror, and you have Nathaniel Hawthorne.
True achromatism cannot be obtained with ordinary flint and crown-glass; and although in lenses of "Jena glass," outstanding colour is reduced to about one-sixth its usual amount, their term of service is fatally abridged by rapid deterioration.
There was a string fastened across the inside of the window with picture and story papers hung upon it; the glass was not very clear, for the frost made it almost like crown-glass, but it was clear enough in the corner to shew one of the pictures, which was a double one; in one part there was a little boy in his night-gown hanging a stocking upon the door of his bed-chamber; in the other part the little boy is shown snugly asleep in his bed, while a most odd little man hung over with toys and picture books of all kinds stands on tip-toe before the stocking, filling it with playthings.