Glass-cutting.
All these operations require the greatest nicety in the workmen; and would take a long time in the performance, and not be very neatly done after all, if they were all done by one man. But the quickness with which they are done by the division of labour is perfectly wonderful.
The cheapness of glass for common use, which cheapness is produced by chemical knowledge and the division of labour, has set the ingenuity of man to work to give greater beauty to glass as an article of luxury. The employment of sharp-grinding wheels, put in motion by a treadle, and used in conjunction with a very nice hand, produces cut glass. Cut glass is now comparatively so cheap, that scarcely a family of the middle ranks is without some beautiful article of this manufacture.
Sheet-glass making.
But the repeal of the duty on glass, and of the tax upon windows, has had the effect of improving the architecture of our houses to a degree which no one would have thought possible who had not studied how the operation of a tax impedes production. We have now plate-glass of the largest dimensions, giving light and beauty to our shops; and sheet-glass, nearly as effective as plate, adorning our private dwellings. Sheet-glass, in the making of which an amount of ingenuity is exercised which would have been thought impossible in the early stages of glass-making, is doing for the ordinary purposes of building what plate-glass did formerly for the rich. A portion of melted glass, weighing twelve or fourteen pounds, is, by the exercise of this skill, converted into a ball, and then into a cylinder, and then into a flat plate; and thus two crystal palaces have been built, which have consumed as much glass, weight by weight, as was required for all the houses in one-fourth of the area of Great Britain in the beginning of the century.
