Page:The Amateur's Greenhouse and Conservatory.djvu/24

18 of boiler is the small space it occupies, and another advantage is that it can be so arranged as to continue burning many hours without attention, a most important matter in a garden where labour is not largely employed. One of the best forms of the conical boiler is that manufactured by the Thames Bank Iron Company, Upper Ground Street, London.

The most generally useful boiler, whether for heating one house or a range of houses, is the Saddle, of which there are many forms, but all of them are variations of an arch or saddle, the interior of which is appropriated to the fire, while the exterior contains the water. The horizontal course of the draught moderates its force, and tends rather in the direction of slow than of fast combustion; but the saddle is not to be regarded as a &ldquo;slow combustion&rdquo; boiler, in the proper sense of that term; it is simply not rapid, and hence does not require frequent attention. The great power of these boilers, and the fact that&mdash;to use a gardener’s phrase&mdash;they will &ldquo;burn anything,’ are their two principal merits, but it must be added that they do not require to be set any great depth below the course of the pipes, and they are remarkaby economical in respect of consumption of fuel, in consequence of slow but perfect combustion. Amongst the best forms of saddle boilers mention may properly be made of the Cannon, which is cylindrical; the Flat Saddle of the Thames Bank Iron Company; the Terminal, made by Mr. Jones, of David Street,



Manchester; and the Double L, made by Messrs. Jones and Son, of 6, Bankside, London.

If a final choice is to be made amongst these, we shall vote