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Updated: May 19, 2025
The time varies a good deal with the seasons, and different sorts of glass take different times to melt. This flint-glass melts the easiest, and common bottle-glass takes the longest. Crown-glass, such as is used for window-panes, comes between the two; but that is not made here." "And when the glass is sufficiently boiled, what next?"
It was found impossible to procure flint-glass, such as was needed for optical use that is, of perfectly homogeneous quality except in fragments of insignificant size.
"Destroyed by fire, June 30, 1832," he replied, with the mournful awe of one giving the date of some terrible human disaster. "How many glass-factories like this are there in the country?" asked Monsieur, reverting to the practical view of the matter under consideration. "Flint-glass works, Sir? There are three in South Boston, two in East Cambridge, and one here in Sandwich.
Its substantial frame of well-seasoned oak, its stout plank bottom, lavishly covered with cement, promised to resist alike the heat and dryness from without and the wet within. The sides and ends, of double flint-glass, seemed to invite the eye across their clearness.
The first actual inventor and constructor of an achromatic telescope was Chester Moor Hall, who was not in trade, and did not patent it. Towards the close of the eighteenth century a Swiss named Guinand at last succeeded in producing larger flint-glass discs free from striae.
You thought it would be Cinderella's slipper, at least, didn't you?" laughed Optima. "But look!" The man, dipping his pipe, not into the ruby glass, but into an adjoining pot of fine flint-glass, carefully blew a small globe, and then removing the tube from his mouth swung it about in the air for a few moments, until it had gained a certain degree of firmness.
That is for Massachusetts alone. Then there are two in Brooklyn, New York, one in Jersey City, and two in Philadelphia. These are all flint-glass, you understand; the principal window-glass factories are in the southern part of New Jersey, and in Pittsfield, Pennsylvania. Then there is a flourishing plate-glass factory in Lenox, in this State, and another in New York.
The largest and most permanent national bodies, however, such as the compositors, the flint-glass makers, miners, and others were formed after 1840; the miners in 1844 numbering 70,000 voting members. Several of these national bodies were formed by an amalgamation of a number of different but more or less closely allied trades.
The Early Works made a specialty of flint-glass crystal, and cut and engraved ware for domestic and ornamental use, also of the finer qualities of shades for lamps and chandeliers.
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