96 THE VEGETABLE CULTIVATOR. 



sufficient length to go across the pit, with about two 

 inches over at each end, to support a double row 

 of common house-tiles ; for which purpose the bars 

 should be so placed, that a row of tiles may be 

 laid lengthways, their sides resting oh each bar, the 

 whole to be worked in with good mortar, and when 

 completed, will be found to approach nearly or quite 

 to a level. Over this layer of tiles there must be 

 another, also closely laid with mortar, and placed 

 in a contrary direction to the last ; this finishes the 

 platform on which the plants are to grow. On the 

 top of the brick-work, round the pit, there should be 

 laid a curb of well-seasoned deal or oak, three or 

 four inches thick by nine broad, on which to rest 

 a frame, should that be preferred to carrying up 

 brick-work of the proper height, twelve inches in 

 front and eighteen at the back. When only a frame 

 for the bearers of the glasses is required, it should 

 be made so as to allow them to take out and in, 

 which will be found a great convenience, when any 

 work is required to be performed in the pit. How- 

 ever, upon the whole, a three-light frame, which 

 can be taken off occasionally, will be found the most 

 eligible ; such a moveable frame must be the same 

 depth as the wall carried up from the platform. A 

 frame used for such a purpose, if made of good 

 sound wood, and painted when observed to be ne- 

 cessary, will last many years. In respect of glazing, 

 the squares of glass, good in quality, are to be of a 

 moderate size, the lap about the eighth of an inch, 

 and well laid in strong putty, and twice painted over 

 before they are made use of. Some persons recom- 

 mend lead lights ; but the author does not agree in 



