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(which is frequently practised by some glaziers), but 

 room should be left for the ribs to swell and expand. 

 Before a light is glazed, all the panes should be 

 laid in loose, to see that they fit easy and are quite 

 level, as well as range one with the other ; when that 

 is done, the panes must be taken out, and some well 

 worked putty laid in the rebate ; the panes must then 

 be replaced and pressed firmly down, and the bottom 

 frame bedded in the putty, so as not to leave a 

 vacancy. When the glass is bedded in the putty 

 along the astragals, the usual way is to ' front putty' 

 the whole at once ; but at Kew, the lights are put by 

 after the glass is bedded till the bedding putty is dry. 

 The astragal then gets a coat of paint, and also a 

 strip of the glass, the depth of the bedding on the 

 astragal, and when this is dry the front putty is put 

 on. The coat of paint on the glass will cause the 

 front putty to adhere to the glass, and it will remain 

 sound many years longer than when it is put on 

 without this precaution. This is a capital contri- 

 vance for lights that slide up and down ; but for 

 lights that are fixed, the best way is to have no front 

 putty at all. Instead of overlapping the panes, as is 

 done in the ordinary way, cause the glazier to cut 

 each with a perfectly straight edge, and then to place 

 them one before the other, so that they shall all fit 

 exactly. When the light is completed, the surface of 

 the glass is perfectly level, and there are no interstices 

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