Flint-glass Sentence Examples

It is chiefly used as a pigment and in the manufacture of flint glass.

For the practical measurement of field intensity du Bois has used plates of the densest Jena flint glass.

If, as in common flint-glass spectroscopes, there is only one dispersing substance, f Sy ds = Sµ.s, where s is simply the thickness traversed by the ray.

The crucibles or pots used for the production of optical glass very closely resemble those used in the manufacture of flint glass for other purposes; they are " covered " and the molten materials are thus protected from the action of the furnace gases by the interposition of a wall of fireclay, but as crucibles for optical glass are used for only one fusion and are then broken up, they are not made so thick and heavy as those used in flint-glass making, since the latter remain in the furnace for many weeks.

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.

The term flint-glass is now understood to mean a glass composed of the silicates of potash and lead.

Hulme, however, who has carefully investigated the subject, is of opinion that flint-glass in its present form was introduced about 1730.

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.

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 prism may be made of a dense flint glass or of quartz if the ultra-violet is to be explored, or it may be hollow and filled with carbon bisulphide, a-bromnaphthalene or other suitable liquid.

Rutherfurd devised one made of flint glass with two crown glass compensating prisms; whilst Thallon employed a hollow prism containing carbon bisulphide also compensated by flint glass prisms. In direct vision spectroscopes the refracting prisms and slit are in the observing telescope.

The prisms are necessarily compound, and usually consist of flint glass with compensating prisms of crown.

It was in vain that the French Academy of Sciences offered prizes for perfect disks of optical flint glass.

The primary reason for this retention is that nothing approaching the difference in dispersive power between ordinary crown glass and ordinary dense flint glass (a difference of i to 13) has yet been obtained between any pair of the newer glasses.

The front lens is made of baryta light flint glass 3.

In its modern form the Leyden jar consists of a widemouthed bottle of thin English flint glass of uniform thickness p. 512.