VARIOUS METHODS OF HEATING DESCRIBED IN DETAIL. 203 



combined with mechanical ingenuity has devised, and which 

 has been carried out in practice with the most gratifying 

 success, so much so, that in some places, separate apparatuses 

 have been torn down, and this system adopted instead, merely 

 on account of the fuel economized thereby. Among the many 

 systems brought before the public, under the fine-sounding name 

 of improved, it is doubtful whether any of them have given so 

 entire satisfaction as the above, where it has been properly con- 

 structed. The facility so admirably afforded by this method of 

 heating any of the connected houses in the space of a few min- 

 utes after it is found necessary, is certainly a great recommen- 

 dation in its favor. In short, you have only to turn a tap, and 

 the thing is accomplished. Fig. 41 represents the ground plan 

 of four houses heated in this way, and most efficiently. 



It will be seen from the plan, that the two end houses on the 

 front are heated by the pipes flowing and returning into the 

 pipes which supply the hot water for the two houses standing on 

 the back. This is easily accomplished by having a tap on each 

 pipe where it enters the house, so that either house may be 

 heated, or both together, if required. 



In the extensive forcing-establishment of Mr. Wilmot, at Isle- 

 worth, near London, no less than seven ranges of houses, each 

 ninety feet in length, are heated by one boiler, and all are heated 

 effectually, and that too for the purpose of forcing grape-vines. 

 In many other places, in England, we know that this method 

 has been adopted with the very best results. 



In the plan here given, the box, (Fig. 42,) which is given on a 

 larger scale, is situated immediately over the boiler. It may, 

 however, be on the same level, or nearly so, a*id situated in any 

 corner out of the way. The boiler here used is a common saddle 

 boiler, and with a large apparatus, is probably the best boiler 

 for general purposes. The apartments, g g, in the cut (Fig. 41) 

 are offices for the garden, tool-house, potting-room, fruit-room, 

 &c., and may be used as a mushroom-house. As the hot-water 

 pipes pass through them, they are kept slightly warmed, and 

 may be made useful as store-rooms and other kinds of garden 

 offices. 



In some places in England, no less than eight or ten different 

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