2123. As an example of a complete and extensive application of steam to the heating of botanic hothouses, we may refer to the garden of Messrs. Loddiges at Hackney, and that of the Duke of Northumberland at Syon House. Both are very complete of their kind, and, having been executed for several years, may be considered as fully proving the superiority of steam, on a large scale, to the former mode of heating by flues, though it is very inferior to hot water. The steam apparatus at Syon House was erected under the direction of the late eminent engineer, Mr. Tredgold, and, it may safely be affirmed, is the most complete apparatus of the kind any where in existence.
