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LXV. An Account of a Steam Apparatus. In a Letter to the 

 Secretary. By Mr. Joseph Haywakd. 



Read October 17th, 1820. 



Sir, 



J beg leave to recommend to your attention a Steam Appa- 

 ratus for heating houses, the invention of Mr. Hague, En- 

 gineer, of Grey Eagle Street, Spital Fields, and for which 

 he has obtained his Majesty's letters patent. By the mode 

 in which the condensed steam is returned into the boiler, 

 without exposure to the atmosphere, this apparatus produces 

 a higher degree of heat, with less danger, less labour, and 

 less expense in the supply and consumption of water and 

 fuel, than can be obtained by any other method at present 

 known. 



Mr. Hague erected an apparatus, on this principle, in a 

 large manufactory under my immediate superintendance ; 

 the boiler of which contains about seven hundred gallons ; 

 the pipes are cast iron, six inches in diameter, and form a 

 range of three hundred feet ; in this apparatus the steam is 

 kept up to a pressure of six or seven pounds to an inch, 

 with the consumption of six bushels of coals in twenty-four 

 hours. 



Being satisfied of the value of this arrangement, I have 

 erected a similar apparatus in a small conservatory, of which 

 I send a sketch, the boiler of which contains about thirty 



