knocked off, leaving a small opening, as at E.

During the progress of the work, at nearly very change of form, the Glass has to be re-warmed. Afterwards, the piece of Glass, F, is made to adhere to a small disk; and softened by the heat of the furnace through the castor-hole pot, (assisted by the heat from the flame of small pieces of dry beech wood,) the opening is enlarged by the pucellas, G, and the neck is formed, which is made to adhere to the post, or disk, H. The other end, I, is partly opened by the pucellas, and partly expanded to its ultimate shape, K, by the flashing process: this consists of retiring it from the heat, to take in comparatively cold air; and afterwards advancing it towards the heat of the castor-hole, which, expanding by rarefaction of the air, accompanied simultaneously with a sharp trundling or rotary motion, the globe form becomes more