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XLIX. Description of a Pit and Stoves heated by Fire 

 and Steam jointly. In a Letter to the Secretary. By 

 Mr. William M< Murtrie, Corresponding Member of 

 the Horticultural Society, Gardener to The Viscount 

 Anson, F. H. S. at Shughorough in Staffordshire. 



Read May 3d, 1825. 



Sir, 



I herewith transmit you a plan and section of a Pit, which is 

 heated by a method rather unusual, but which has such merit, 

 that it only requires to be more known to be generally adopted. 

 The method is very simple, and so easy of execution that it 

 may be carried into effect by any common bricklayer and 

 plumber; the expense of the whole work is trifling, and when 

 executed affords many of the advantages which arise from 

 houses heated by steam, and without any consumption of 

 coals beyond that which is required for warming the flue. 



I have now had experience with houses of this description 

 for nearly twelve years; during which time I have been 

 entrusted with the care of Lord Anson's Gardens at this 

 place ; and my opportunities of observing their superior pro- 

 perties having been ample, I therefore have no hesitation in 

 recommending them. 



Theoutline of the construction ofthese houses is this; instead 

 of a deep pit to be filled with tan, a shallow one is formed, by 

 turning a flat brick arch over the space usually occupied by the 

 tan-bed; mt o and through the hollow chamber thus formed, 

 a flue constructed in the usual manner is carried. On the 



