HOT 



312 



HOT 



for a longer or shorter period as may be : room for tlie gardener to walk between 

 desired. Under the paved walii in the I tliem, to hold the plants, wliich it is ex- 

 hot-house, a reservoir is formed in bricli I pectcd will do very well even in the 

 and cemented, into which all the rain vinery, as there are front sashes, and 

 ■which falls on the roof of the house is i the vines will be confined to the rafters 

 collected. A moveable pump is in- in the roof. One table rests on one 

 serted in one end through a hole cut side on the front wall, and on iron legs 

 into the stone, for raising the water for on the other ; the other table is spp- 

 use in the house. The gutters are fit-' ported entirely by iron legs lying close 

 teen inches wide and five inches deep, ' against the gutters. By this arrange- 

 and formed in fifteen inch lengths ; ment the gutters are secured against 

 simple open troughs, as shown in sec- being broken or disturbed by any 

 tion, excepting at angles, where there , chance accident. The boiler is of cop- 

 are three pieces, one for each angle, I per, having a pipe at the top through 

 formed in a different mould, tliere being j which the hot-water rises, with a cross 

 no joint at the angles, and the two end j pipe having two cocks in it with a brass 

 pieces which are formed with projecting : union on each side at the bottom to re- 

 collars to receive the pipes from the [ ceive the return pipes ; so that the cir- 

 boiler. The gutters are covered with ' culation may be carried on throughout 

 tiles, one and a quarter inch in thick- the house and the pits at the same time, 



ness. It will be seen that the flow and 

 return gutters are connected at two 

 points, in order that the circulation may 

 be confined between either and the 

 boiler. At these points the gutters are 

 covered by a wooden frame instead of 

 a tile, in which is fixed a movable 

 cover, which exposes the plugs by 

 means of which the circulation is di- 

 rected across the house, or extended at 

 pleasure along the entire range. If it 

 ii desired to confine the circulation to 

 the stove, the plugs at 1 are inserted, 

 and those at 2 withdrawn. On refer- 

 ence to the section of the house, it will 

 be seen that the back wall is carried 

 down considerably under the level of 

 the ground to admit of a bed of earth 

 on the inside about four feet deep ; then 



or confined to either at pleasure by 

 means of the two cocks in the upper 

 pipe. 



" The construction of the pits is as 

 follows: — The floor is formed of bricks 

 laid flat on a bed of concrete and set in 

 cement. The tanks are then formed 

 by carrying tiles made of pottery, one 

 inch and a quarter thick and five inches 

 deep, round the outer edge, and on the 

 top of the brick floor, a double row be- 

 ing carried along the centre to support 

 the covering tiles which form a floor, 

 and return tanks about two feet six 

 inches wide; these are covered with 

 tiles the same as the gutters in the 

 house upon which the earth rests. It 

 will be seen on reference to the section 

 of the pits, that the front tank is fin- 



comes the reservoir about three feet i ished so as to leave a space of about 

 deep, three wide, and sixteen in length, three inches between it and the front 

 covered by pavement. The earth on; wall; slate slabs, two feet six inches 

 which the gutters are placed has not deep, rest on the tank to keep up the 

 been moved ; but in order to make it earth, and at every five or six feet, 

 level and firm, it was covered with a j where the joints in the slabs occur, 

 thin coat of concrete at every fifteen I there is a single brick carried up be- 

 inches, where the joints occur, they are ] tween the joints and the front wall to 

 laid on two bricks, in order that the ; support the slabs against the pressure of 

 under as well as the upper surface the earth. The object of this and also 

 should radiate heat: every foot run of round pipes of pottery which rest on 

 of gutter presents a surface of forty ' the surface of the tanks at a, and pass 



inches radiating heat. The potter can 

 deliver these gutters and covers at 

 some distance from the pottery, at Is. 

 6d. per foot run ; whereas an iron pipe 

 with a four inch bore, which afibrdsbut 

 twelve inches of radiating surface, I 



up tlirough the earth, is to furnish dry 

 heat and to promote a free circulation 

 on the surface, which is found advan- 

 tageous for propagating^ At the points 

 marked S are similar pipes, which pass 

 through the tiles covering the tank, 



believe is usually sold at Is. per foot at which are formed with an opening for the 

 the factory. There are two slate tables ' purpose into the tanks ; these are fitted 

 the whole length of the house, with i at the top with wooden plugs for the 



