THE AMATEUR’S FRAME 283
The frame should be built of fairly solid material, and should be so arranged that there is a slight fall from back to front to throw off the rain. There should also be guides at the side to keep the light in place when it is being pulled
Diagram 55.—Protecting Cold Frame from Frost: 1. Section of frame. 2. Plan of frame. Letters apply to both figures : æ, frame ; bi ashes or soil; c, wood built up round the frame ; d, posts to support the wood ; e, litter put over the lights ; f, mat to keeplitter in place.
up and down. Beyond this the frame should be fairly air-tight and painted to increase its durability. With such a frame, no matter how small, the owner should have many advantages over those who have no such convenience.