FORCING DEPARTMENT. 325 



the most essential requisite in the heating of I lot- 

 Houses, &c. is to have the apparatus constructed 

 upon such principles, as will, in severe weather, give 

 a perfect command of the internal atmosphere of the 

 compartment in which it is introduced, and which 

 shall retain the heat to a sufficient degree, with the 

 least attendance and consumption of fuel. I shall, 

 hereafter, prove that nothing has yet been invented 

 to surpass, or even equal the hot water system, for 

 the above mentioned purposes, when properly exe- 

 cuted. There have been, however, several the- 

 oretical schemes resorted to in the formation of the 

 pipes, &c. upon a very mistaken notion, as, for in- 

 stance, that of constructing the pipes of such shallow 

 dimensions as to contain scarcely any room for hold- 

 ing a body of water. The object of the inventor 

 was to increase the temperature of the house rapidly ; 

 but he omitted to take into due consideration what 

 was necessary to retain the heat afterwards, and, 

 hence, the failure. 



But if the pipes, &c. are properly constructed, I 

 will maintain that the temperature of a house can be 

 both more quickly raised, and longer retained, than 

 was ever the case with smoke flues. In the Forcing- 

 Houses at Woburn we can heat a compartment, 

 in which the boiler and pipes together, contain 112 

 imperial gallons of water, to 132 degrees in the 

 boiler, in forty minutes from the lighting of the fire, 

 and to 152 degrees in one hour; and that without 

 consuming more than three-fourths of a bushel of 

 coal. When water is heated to 152 degrees, it was 

 considered by the late Mr. Tredgold, and others, 



