chiefly between London and Sheffield. 



439 



room within, not by the tight fitting of the sides of the small window to 

 the sides of the frame, but by the contact of the edges of the sides of the 

 small window with the beads forming the rebates attached to the inside of the 

 frame ; and also by means of the contact of the beads, or rebates, of the small 

 window with the edge of the sides of the large one, or frame into which it 

 shuts. In consequence of the sides never touching, the window moves with 

 the greatest ease, whether expanded by heat in summer, or contracted by cold 

 in winter, and weather-painted and smooth, or unpainted and rusty. 



Fig. 101. is a horizontal j t 101 j 



section across the small win- 

 dow, and the two side bars, 

 showing the outside beads at 

 g g } and the inside beads at 

 hh. 



Fig. 102. is a vertical section through the small window and 

 the top and bottom bars of the fixed frame, showing a weather 

 fillet, or weather table, which projects half an inch from the 

 general face of the window at h, and the staybar in the situation 

 in which it rests when the window is shut, and also the groove 

 and guiding rod at i. 



The total weight of this window before being glazed is about 

 61J lb., and the prime cost in Derby is 12*. 4>%d. thus : — 



102 



2 castings, 60 lb. at \\d. 



Ironwork, 1J lb. at Is. Id. 



Fitting up, 6 hours at 24s. per week 



Scurfing castings, 4 hours at 12s. per week 



Priming window - 



Paint ... - 



s. 



d. 



7 



6 



1 



4 1 



2 







1 











3 







3 



Prime Cost 12 4* 



We consider this by far the cheapest and best cottage win- 

 dow that has been hitherto invented j it has been used in a 

 great variety of buildings for 10 years, and when it is known, it 

 can hardly fail to come into general use in cottage dwellings 

 and manufactories. In London it may be obtained of Messrs. 

 Cottam and Hallen, Winsley Street, Oxford Street, for 13s. 6d. 

 for a single window, or where there are more than half a dozen, 

 for 12s. 6c?. each; at Messrs. Cubitt's, Gray's Inn Road ; and at 

 Mr. Roe's in the Strand, manufacturer of zinc and of tinned iron. 



Door Staybar. — To understand how this staybar may be applied to opening 

 doors fully, or as in the case of hot-house doors, to any degree of width, and 

 to retain them fast at whatever angle b 



it may be desirable to set them open, 

 or to keep them fast when shut, it is 

 only necessary to suppose the groove 

 fixed to the wall horizontally behind 

 the door. 



Fig. 103. represents a horizontal 

 section through a door (a), the wall 

 of the hanging style to which it is 

 hinged (b), and the wall against 

 which it shuts (c). The door is 

 supposed to be shut, and it is held 

 in its place by the staybar d, which 

 moves on a stud at e, and along a 

 groove from / to g. All the rest 

 requires no explanation to any one 

 who has understood the description 

 of the window. g g 4 



