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How It Is Made
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being engraved very carefully in the walls of the mould. Machines are now used for making bottles and lamp glasses partly by squeezing, partly by blowing with compressed air. We may here mention a simple apparatus for making glass stoppers with flat heads and tapering shanks, such as are used for sauce bottles.

Glass Stopper Mould.
Fig. 59.--Glass Stopper Mould.

A section of it is given in Fig. 59. The solid black part C, the "bed," has a number of circular depressions sunk in its upper face, immediately below an equal number of holes in the "centre" B, and also two projecting pegs for maintaining B in its correct position. When a "nest" of stoppers is about to be pressed, the workman places B on C, and lowers