Transactions of the Horticultural Society. 191 



and reservoir so adjusted may be conducted in any direction, 

 and ascend and descend at pleasure, or in the most irregular 

 manner (d e), so as they never rise higher than the level of the 

 water in the boiler and reservoir (a a). The cold water pipe (f) 

 and warm water pipe (g), provided they proceed from the 

 boiler and enter the reservoir, the former lower than the latter, 

 may be placed side by side in the space to be heated, either 

 under the path of a hot-house (h), or so high (z) as to be out of 

 the way of plants, or of persons walking in the paths. Hence 

 hot-walls and the different floors of a dwelling-house may be 

 heated on this plan with the same facility as hot-houses, pits, 

 or frames. For example, if Messrs. Loddiges, at Hackney, or 

 Mr. Gunter, at Earl's Court, were to alter their mode of heat- 

 ing from that of steam to that of water, as their boilers are 

 considerably above the level of the steam-pipes, all that would 

 be necessary to procure a circulation of water in these pipes 

 would be to have elevated reservoir tubes at the extremities 

 of the different portions of their range, which they are in the 

 habit of heating separately. These pipes need not be above 

 an inch in diameter, and may be so bent and concealed as 

 not to obtrude on the view, or in the slightest degree inter- 

 fere with effect. All that is necessary is to recollect the fun- 

 damental principle of equal pressure. A very slight perusal 

 of the article Hydrostatics, in No. 1. of the Library of Useful 

 Knowledge (8vo, many cuts, 6d.), will explain this principle 

 to any gardener of ordinary capacity. It is proper to state, 

 however, that this mode of heating will always be carried 

 into effect at least cost on level surfaces. 



It is a gratifying proof of an enlarged and liberal mind in 

 Mr. Turner to find that he who first suggested to Messrs. 

 Loddiges the advantage of heating their houses by steam, and 

 by the means of their example and his own, has mainly con- 

 tributed to spread that mode of heating throughout the country, 

 should have been one of the earliest to adopt a superior 

 method. To give the system that popularity which it de- 

 serves, it only remains for Messrs. Loddiges and Mr. Gunter 

 to turn their steam-pipes into water-pipes ; and though it is 

 not very reasonable to suppose that tradesmen will be so free 

 in adopting alterations as men of fortune, yet, though we have 

 never spoken to either of the parties mentioned on the sub- 

 ject, we should not be at all surprised at seeing the change 

 effected. At all events, we are certain of this, that steam will 

 never again be employed in gardening, as a medium of con- 

 veying heat. If all those who now employ it in that way do 

 not adopt the water system, so much the worse for them. 



