The Garden Under Glass
Forfatter: William F. Rowles
År: 1914
Forlag: Grant Richards Ltd. Publishers
Sted: London
Sider: 368
UDK: 631.911.9
With Numerous Practical Diagrams From Drawings By G. D. Rowles And Thirty-Two Illustrations From Photographs
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194 THE GARDEN UNDER GLASS
the frame. Then if the frame be 6 feet by 4 feet the dimensions of the hotbed will need to be 9 feet by 7 feet. It is essential that the material be well trodden, or the heat will be violent at first, but will not last long. After every layer is put on, treading should be done. It is useless to make up the bed first and try to tread it afterwards.
Diagram 38.—Hotbed : 1. Plan of hotbed sbowing position of frame. Outside line shows dimensions at bottom, and dotted lines dimension at top.
2. Section of frame set on hotbed. 3. Heating material put into a brick pit.
4. Heating material put in a hole with frame over. Further litter may be added at («).
When nearing the top of the bed, set the frame in place, and then put some of the material inside it and tread well down. This precaution is necessary because the material will sink, and it may not sink equally, thus leaving a space at the bottom of the frame.
An easy method of knowing how the heat runs in a hot-