crown-glass

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 Atlantic Monthly, Volume 03, No. 20, June, 1859 Various

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."

The Winning of the West, Volume 4 Louisiana and the Northwest, 1791-1807 Theodore Roosevelt 1888

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.

Sketches from Concord and Appledore Frank Preston Stearns 1881

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.

A Popular History of Astronomy During the Nineteenth Century Fourth Edition 1874

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.

Seven Little People and their Friends Horace Elisha Scudder 1870