CONSERVATORIES AND SMALL GREENHOUSES 161 
the posts as indicated in the plan on page 158, taking 
care to get the lines for the ends of the house per- 
fectly square with the wall, and exact in length. 
This is best done by laying out your lines first with 
stout string, and making your measurements ac- 
curately on these. Then put in the posts for sides 
and ends, setting these about three feet into the 
ground, or, better still, in concrete. Put in the two 
corner posts, which should be square first. Next 
saw off all posts level at the proper height, and put 
in place the 2 x 4 in. eaves plate on top of these and 
the 2 x 6 in. sill just far enough below to take a 16x 
24 in. light of glass, with its upper edge snug in the 
groove in lower side of plate, as shown in detail of 
section on page 159. Fit the 2x 6 in. sill about the 
posts so that the mortice on same will just clear 
the outside of posts. Then put on the siding on 
sides and ends — first a layer of rough inch-boards, 
running vertically, a layer, single or double, of tar 
paper, and a second layer of boards, laid horizon- 
tally, covering on the outside with shingles, clap- 
boards or roofing paper. The five 7 ft.x I I-4 in. 
pipe posts may now be placed loose in their holes, 
and a walk dug out of sufficient depth to allow pas- 
sage through the middle of the house. Rough 
boards nailed to stakes driven into the ground, will 
hold the earth sides of this in place. 
Next, after having it sawed in two vertically 
(thus making 20 ft), screw the ridge securely 
