Glass-makers' tools are but few in number, and extremely simple. The pucellas, A, is somewhat like a pair of spring sugar-tongs, the prongs resembling the cutting parts of shears, but blunt, and used for rubbing the outside of solid or hollow glass, and pressing it into a diminished diameter, at the same time elongating the parts by the chair-rotating process. This tool does the same duty as the cutting tool of a lathe; but instead of removing chips or waste, (as in the process of reducing the diameter of the wood or metal,) it simultaneously squeezes and lengthens. (See Wine-Glass Chair, at p. 83.) This principal tool is also employed to open or close the insides of wine-glasses, bowls, jugs, vases; and to shape generally the Glass, as it rotates at the pleasure of the workman. The spring tool, B, is a species of tongs for laying hold of half-formed handles, and generally to seize Glass while making. The shears, C, are but strong ordinary scissors, used for cutting off the surplusage of glass handles, and to level the edges of bowls of wine-glasses, &c. Much skill is required to shear wine-glass: it is held upon the iron by the left hand, and rotated towards the shears, which are grasped in the right hand