200 VARIOUS METHODS OF HEATING DESCRIBED IN DETAIL. 



importance, connected with horticulture, at the present day, and 

 his opinions are endorsed by almost every gardener of note in 

 England. Mr. Fleming, of Trentham, and Mr. Paxton, of 

 Chatsworth, as well as many others, regarded it as a thing ut- 

 terly unworthy of notice. Mr. Ayres, in the same paper already 

 quoted, puts to the advocates of Polmaise the following conclu- 

 sive and unanswerable query. If Dr. Lindley, or any other of 

 its advocates, can point to one place where the apparatus is at 

 work, and as efficacious as a hot-water apparatus ; if they can 

 refer us to any one place, where we can see better productions 

 than what have resulted from the use of hot water, why, says 

 he, I am ready to spend five sovereigns to go to see it, and be 

 convinced of my error in opposing it ; but until then, it is mere 

 nonsense to suppose that any responsible person wnll adopt it. 



As an example of a combination of hot water and hot air, 

 applied in a practical and scientific manner, the following sys- 

 tem is superior to any other with which I am acquainted, espec- 

 ially for small houses. It supplies heat, moisture and air, either 

 singly or combined. It consists of a cast or plate iron boiler, a, 

 for containing the water ; in shape it is not unlike a pretty large 

 inverted flower-pot, with a hollow between its sides, about four 

 or five inches wide, having one pipe entering near the top for 

 the flow, and another at the bottom for the return, with a tube 

 entering quite through to the fire-chamber, as represented at 3, 

 c, and d ; then there is a hot-air chamber round the boiler and 

 fire-place, as shown at e, e, e, Figs. A, B, and C ; the boiler 

 rests on a circular course of bricks, forming the furnace/,/. 

 Figs. B and C. The whole is enclosed by the hot-air chamber, 

 from which the air is conducted into the house, at h, and is 

 supplied with cold air, both for the combustion of fuel, and 

 drawing off the heated air, at i, i. Fig. C. The fire is fed 

 through the door in the chamber, y, opposite which is a smaller 

 door in the furnace, at k. In Fig. C is shown the door of the 

 ash-pit, Z, through which the ashes are drawn. We know of no 

 apparatus, where a small green-house or conservatory is required 

 to be heated, that will do it so cfTef'tually and economically as 

 this. No particle of heat generated is lost, and in its simplicity 

 is evervthinof that a novi'!e could desire. Here is nothino; more 



