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XXIX. Description of various Modes of Heating by Steam, for 

 Horticultural Purposes. By Mr. Henry Stotiiert, Civil En- 

 gineer, Bath. 



Read February 21, 1832. 



The following are descriptions of methods which have been 

 found to combine simplicity, cheapness and efficiency in a greater 

 degree than any other modes with which I am acquainted, of apply- 

 ing steam and hot water to various buildings for garden purposes. 

 At the request of several gentlemen who have adopted them, I take 

 the liberty of submitting an account of them to the Horticultural 

 Society. 



For Pine Pits. 



Fig. 1 and 2, Plate 7, represent a mode of obtaining bottom-heat, 

 by means of a cistern of water heated by small steam-pipes, which are 

 introduced near the bottom, leaving only sufficient drainage 1 to take 1 

 away the condensed water. The depth of water in the cistern is 

 about one foot, which is warmed generally about twice a day by 

 means of two one-inch steam-pipes, each going to the further end 

 of the cistern, and returning again in the opposite direction, as 

 shewn in the sketch ; by this means the heat is very equally distri- 

 buted. At each end of the cistern a small passage is left for the 

 purpose of ascertaining the temperature of the water, and which 

 will, if left open, admit considerable humidity to the house or pit. 

 Across the cistern are laid joists, which support a paving of stone 

 or brick, laid without mortar, on which is placed a bed of broken 

 stones or bricks about one foot in thickness, which, towards the top 

 are about the size commonly used for Macadamizing the public 



