HOT 



309 



HOT 



*—— 



wall, and the bricks being all of the to slate, but considers that plates of 

 same thickness though of diflerent iron, applied in the same way, might 

 widths, the external appearance will be , answer the purpose nearly as well, 

 everywhere the same." — Enc. Card. provided that their surfaces were black- 

 Hot walls are generally overheated i ened, which would cause them to ub- 

 opposite the first turn of the tlue, and sorb more of the solar rays. Even 

 not heated enough at a distance from ; frames of glass might answer the pur- 

 thefire. Mr. Hay lias obviated this, by j pose applied in the same manner, and 

 having a hollow in the interior of the . perhaps some other materials might do ; 

 wall, serving as a general heat-chamber | but it is desirable that the frames should 

 for diffusing and retaining warm air, be light enough to admit of their being 

 and also smoke-dues for conveying heat removed without dilficulty, in order 

 throughout. — Hort. Trans.; Gard. Mag. that these partitions may be shifted 

 The Rev. J. A. H. Grubbe, of Stan- from place to place, (put under cover 



ton St. Bernard, Wiltshire, has taken 

 out a patent for a Transmitting-heai 

 wall. The intention is to erect this 

 partition in gardens, as a substitute for 

 walls, against which fruit trees may be 



during winter,) and set up in different 

 parts of the garden, as convenience 

 may dictate. — Nicholson's Jown.; Gard. 

 Mag. See IVall. 



HOT-WATER as a source of heat 



trained, and through which the warmth for gardening purposes is preferable to 



of the sun may, by reason of their thin 

 iiess, be transmitted, which will greatly 

 promote the ripening of the fruit, and 

 improve its flavour. The material pro- 

 posed to be employed for constructin 



any other. It is less expensive, more 

 manageable, and less troublesome than 

 any other. See Tank System and 

 Stove. The following are some of the 

 best modes of its application to various 



these walls or partitions, is slate of the structures 

 ordinary quality, in slabs, of the kind Fine-Pit. — The best that has been 

 usually applied to the roofing of houses. ! constructed is thus described by Mr. G. 

 Iron frames are proposed to be pre- Fleming: — 



pared for the reception of the slates, ' In " a pine-pit recently erected at 

 like the frames of windows, (with holes Trentham, the tank system of bottom- 

 in both sides for inserting wires to serve heating and that of hot water pipes for 

 as a trellis,) and the slates being cut to ■ top-heat are combined ; and for keep- 

 proper shapes and dimensions, may be [ ing a sufficient and steady heat with a 

 secured in the rebates of the frame by small consumption of fuel, nothing can 

 j)utty, in the same way as glass. These be more satisfactory. The pit is seven- 

 frames are to be from six to eight feet ty-scven feet long, and twelve feet 



wide, and of a suitable height, and may ''' :--:j- — i :,. t,-..»-,i i v... ;~ 



be joined together side by side, by re- 

 bates or flanges, and held fast by screws, 

 bolts, pins or staples: or in any way 



that may be found desirable to secure .m,,. ,..,^v,,«..« ...v^. , „ , 



them firmly. Temporary blocks of is again received by another pipe. The 

 stone may be placed along the ground i advantage of two deliveries is, that the 

 to support the partitions, with cross j water not having so far to go does not 

 pieces to receive standards or slight get so cold before it is returned to the 

 buttresses to keep the wall or partition boiler, and the heat is more regular in 

 perpendicular, and against the face of all parts of the house. The depth of 

 the wall, trellis work of wood or other water in the tanks is about three inches, 

 fit material may be placed for the sup- 1 The tanks are made of brickwork coat- 

 port of the branches of the trees. Walls ed with Roman cement. They are 



wide inside, and is heated by what is 

 called a saddle boiler. Under the bed 

 are four tanks, into which the water is 

 delivered from the boiler by a four 

 inch pipe, and after pursuing its course. 



or partitions for gardens formed in this 

 way will transmit the heat of the sun 



arched over with brickwork also, which 

 we find cheaper than covering them 



— J - • — •• " 1 — 



through them, and hence fruit which with slates, and by leaving interstices 

 may be growing against these walls between the bricks of which the arch 

 having a northern aspect, will receive ; is composed the steam is allowed to 

 the benefit of the sun's warmth trans- i escape, and penetrating the stratum of 

 raitted through the slates. In the con-, rubble above, to keep the tan in a pro- 

 struction of these transmitting walls, | per state of moisture. The same boiler 

 the patentee does not confine himself also supplies a range of four inch pipe, 



