London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 45
in the daytime, as it acts upon them as a naturalwarm dew. The flue should be covered with earth, about 8 or9 in. thick, but at first only that depth near the plants, and thenby degrees, all over the bed, as the plants extend themselves.A small thermometer should be placed 6 in. deep in the… … oval leaden pipe, 3 in. diameter, to be placed in the centre ofthe hotbed, and filled with boiling water towards evening, r.An upright pipe, 1 in. diameter, to fill the oval pipe, d, Apipe, 1 in. diameter, to draw off the water when cold, e e, Twopipes placed upright, 1 ft. long each, 2 in.…
Architecture
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