308 



HOT 



surrounded by nine inch brick work 



One half of this is filled longitudinally i maurocenia 

 with dung at the commencement, which 



the steam of the dung; I, represents 

 one of two plugs, which stop holes left 

 to regulate the heal and steam as may 

 be necessary. The outer wall supports 

 the lights. For the convenience of 

 fixing the dung, it is best to fill the half 

 of the chamber at the commencement, 

 before the branches, mould, &c., are 

 put in. 



Hot-water is a much more manage- 

 able source of heat for a hot-bed than 

 fermenting vegetable matter, and for 

 plans see the title Hot-Water. 



HOT-HOUSE. See Stove. 



HOTTENTOT CHERRY. 



HOTTENTOT-FIG. 



Cassine 

 Mesembry- 



if kept close shut up, will last twelve or | anthemum edule. 

 eighteen days, according to the quality I HOTTONIA palustris. Hardy 

 of the dung. As the heat declines, the ; aquatic. Division. Stillwater, 

 other side is filled, and the temperature j HOT-WALL is a hollow wall, the 

 is further sustained by additions to the interior air being so heated by flues or 

 top of both as the mass settles. When i hot water, as to keep the bricks of which 

 this united heat becomes insufficient, I its faces are composed so warm as to 



the side first filled being cleared, the old 

 manure must be mixed with some fresh, 

 and replaced, this being repeated alter- 1 

 nately to either heap as often as neces- 

 sary. A A, are the doors, two of which 



promote the ripening of the wood and 

 fruit trained against them. 



Mr. Loudon observes, that " the flued 

 wall or hot wall is generally built of 

 brick, though where stone is abundant 



are on each side lor the admission of and more economical, the back or north 

 the dung. They are two and a half feet ! side may be of that material. A flued 

 square, fitted into grooves at the bottom, ! wall maybe termed a hollow wall, in 

 and fastened by means of a pin and ! which the vacuity is thrown into com- 

 staple at the top. B B, are small areas i partments to faciliate the circulation of 

 sunk in front, surrounoed by a curb of' smoke and heat from the base or surface 

 wood ; G G G, are bars passing longi- i of the ground to within one or two feet 

 tudinally as a guide and support in pack- of the coping. They are generally 

 ing the dung; C, represents a bar of arranged with hooks inserted under the 

 cast-iron, two inches wide and three coping to admit of fastening some de- 

 quarters of an inch thick, placed on the scription of protecting covers, and 

 edge of which there is a row, a foot sometimes for temporary glass frames, 

 asunder across the chamber to support' A length of forty feet, and from ten to 

 a layer of small wood branches and fifteen feet high, may be heated by one 

 leaves, H, for the pupose of sustaining fire, the furnace of which, being placed 

 the soil, K, in the upper chamber ; E E, one or two feet below the surface of the 

 represents the orifices of which there ground, the first course or flue will com- 

 ai-e a series all round the pit, communi- mence one foot above it, and be two 

 eating with the flue F F F, which sur- ' feet six or three feet high, and the 

 rounds the beds: the exterior wall of second, third, and fourth courses nar- 



this flue is built with bricks laid flat, the 

 inner one of bricks set on edge. The 

 flue is two inches wide, and for the sake 

 of strength, bricks are passed occa- 

 sionallv from side to side as ties. The 



rower as they ascend. The thickness 

 of that side of the flue next the south 

 or preferable side, should, for the first 

 course, be four inches, or brick and 

 bed; and for the other courses it were 



top of the flue, and the internal part of desirable to have bricks cast in a smaller 

 the wall, which rises at the back and mould ; say for the second course, three 

 front to the level the earth is meant to inches; for the third, two and three 

 stand, are covered with tiles, over the quarter inches; and for the fourth, 

 joints of which slips of slate bedded in I two and a half inches in breadth. This 

 mortar are laid to prevent the escape of | will give an opportunity of leveling the 



