GLASS AND GLAZING. 



37 



ing that when the price per box (of 22 lights) of single- 

 thick glass, 14x24, was$2.25 ( 

 the cost of double-thick was 

 $2.85. 



There are two styles or 

 methods of laying glass, the old- 

 time or common method of lap- 

 ping it, and the butting it end to 

 end. The advantages of the but- 

 ting method are supposed to be 

 the greater ease and speed of lay- 

 ing the roof, a tighter roof, one 

 which admits more light because 

 of the absence of laps, and econ- 

 omy of glass. The style of bar 

 to be used for butting is one with 

 a very shallow muntin or projec- 

 tion on top, as in 

 that shown on the ^ w ail,plat e , and sash-bar. 



right in Fig. 17. The glass is not laid in 

 putty*, but it is advisable to have the bar 

 freshly painted in order to close the joint 

 with the glass. The panes are laid end to 

 end, and are held in place, when an entire 

 run has been laid, by screwing down a cap, 

 as shown in the illustration. It is often 

 advised to cover the ends of 

 the panes with a thin film of 

 white lead, in order to cement 

 the panes together and thus 

 close the joints. All the lead 

 which is squeezed out of the 

 joint is afterwards scraped off, 



21. Tin gutter at foot of the 

 sash-bar. 



so as to make a clean and 



*A durable putty for glazing purposes is made by mixing pure whit- 

 ing in oil, and then using about three parts of this, by weight, to one of 

 pure white lead, mixing the ingredients thoroughly. 



