business of the glazier is confined merely to fixing or inserting pieces of glass into sashes of wood or iron or into leadwork. The sash bars, either of wood or of iron, are rebated on the outside, and the glass is stopped into them by a bed of putty. A coat of paint is always placed upon the sash bars or upon the rebates, to prepare the sash for the reception of the putty, which would not otherwise become firmly attached. When this paint or priming is sufficiently dry, the pane is fitted in with such nicety that a point can hardly pass between the sash and the pane, the object being to permit the glass to be incased completely in the putty, which must be very narrow in extent. When the size of the pane is thus assured, a slight tracing or bed of the putty is carried around the sash bars and the light fitted into it, being rubbed down carefully with the finger, so as to force the putty into a complete framing for the glass, which is bedded back against it and secured in the rebates by putty in front, sloping from the inner to the outer edge. The putty on both sides should then be cov ered with a coat of paint, to prevent shrinkage. When large and heavy panes are used, they are further secured by small brads of iron or copper, hidden from view by the front putty. The edges of the large plates in doors are for greater safety often bedded in wash-leather. In very large lights, as further security against the constant contraction and expansion of the material, the putty is made constantly pliable by a mixture of tallow or oil, so that it may change with the movements in the glass.
Lead lead glazing,—now generally confined to churches— the glass is placed in the grooved edges of narrow leaden bars, which are opened up to receive it and then closed firmly upon it. These leaden bars are then soldered together into squares, diamonds, and other forms, or are bent to the shapes of the different pieces of glass used in the pattern. In the latter case it is styled fretwork. The fanciful styles of modern archi tecture have introduced much ornamental glazing, with glass of many styles of colorings.
/ iirieties of French window glass is prepared in lights or panes from an inch square to a width of S feet and a length of 14 feet. The difficulty in manufacturing the larger panes causes the price to rise in a rapid ratio. Plate glass is esteemed very highly, as it does not yield to the diamond and cannot be noiselessly removed; it is sometimes rolled, ribbed, or plated, and is also made in diamond patterns. Orna mental glass for windows is made ground or obscure, with a transparent figure finished by polishing away the portions of the rough surface. Com mon window glass is of an inch, and the double-thick glass nearly ;ti of an inch, in thickness. The latter is much stronger than the thinner forni.