CULTURE in the mushroom-house being the most practised, and, on the whole, the most important phase of the subject, we will first treat of it. And first of the mushroom-house itself. Its construction is very simple: the conditions to be obtained are equable temperature, secured by thick or hollow walls and by a double roof. Figure 1 shows a house designed for me by Mr. Ormson, the well-known horticultural builder. It is situated at the back of the hothouses, where a flow and return pipe can be run through for artificial heat. The shelves for making the beds upon are of slate 1½ in. thick, or of stone 2½ in. thick, built into the walls, and into brick piers built in cement. Upright slates, t…
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