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be braced with short scrap pieces of boards and stakes, so that it will 



not change its location nor be thrown out of plumb. 



The next step is the con- 



2 '* 6 ' struction of the front of the 



pit. This is made just as was 



the back, with posts or 2x4- 



inch scantlings and with top 



planking, differing only in that 



A the distance from the bottom 



of the pit to the top of the 



planking is but 36 inches. 



This planking also should be 



well braced. 



The distance from the south 



face of the back posts to the 



north face of the front posts, 

 Fig. 13.— Corner of hotbed on a levd plane> j g 5 feet io i 



inches, and from the north face top edge of the back planking to the south 

 face top edge of the front planking it should be 6 feet. This allows for 

 a 6-inch fall, or slope, of the sash when placed on the bed. 



The boarding under the top planks, on both the back and the front 

 scantlings of the pit, can be either 2-inch planking or, better still, common 

 boards such as scrap lumber or short pieces. It is to be of double thick- 

 ness, care being used in covering joints and cracks with the inner layer. 

 In the author's experience, this boarding has given complete satisfaction. 



The ends of the bed are 

 either planked or double- 

 boarded from the bottom of 

 the pit to the top of the front 

 of the bed. The end boards 

 are nailed to a short piece of 

 2x6-inch plank fastened to the 

 ends of the back boarding, and 

 also to pieces nailed vertically 

 to the ends of the front 

 boarding. For a top piece to 

 properly fill in the space left, 

 a 2x6-inch plank is split across Fig. 14. — Cross-section of crosstie. The space 

 corners SO that two pieces 5 between A and B allows for swelling of wood and 



, . , for free movement of sash 

 feet 8| inches long are obtained, 



one end of each being 6 inches wide and the other end tapering down to 

 ^s of an inch or less. The tapering pieces are then laid on the top 



roR m£ sash 



