Hulme, however, who has carefully investigated the subject, is of opinion that flint-glass in its present form was introduced about 1730.
There were 88 glass 88 It is probable that the flint-glass of that date was very different from the flint-glass of to-day.
It is the development of this craft in connexion with the perfecting of flint-glass that makes the 18th century the most important period in the history of English glass-making.
The term flint-glass is now understood to mean a glass composed of the silicates of potash and lead.
These are of dense flint-glass (Schott 0.102), and each has a refracting angle of 63° 29'.
Dollond ayant eu besoin de Bass pour un verre que demandoit le duc d'Yorck, Bass lui fit voir du crown-glass et du flint-glass.
Injurious as the excise duty undoubtedly was to the glass trade generally, and especially to the flint-glass industry, it is possible that it may have helped to develop the art of decorative glass-cutting.
The duty on flint-glass was imposed on the molten glass in the crucibles and on the unfinished goods.