664 



Select Suburban Residences. 



Hermit's Seat, and Classical Vase. 



angles, were cast with the boiler, on the calculation of the 

 squares of the diameters, the service pipes being 4 in., and the 

 others nearly 6 in. 



" These arrangements have now had sufficient trial to prove 

 their efficiency. Mr. Pratt can give and secure the continuance 

 of whatever heat he considers necessary, without any attention 

 to the fires during the night. It was necessary to look at the 

 fires in the night during the use of a very highly praised boiler, 

 which was obliged to be used in consequence of failure in pro- 

 curing a large coalbox, and the founders not being able to send 

 the present boiler in time. Since the present boiler has been 

 fixed, neither Mr. Pratt nor any one under him has ever looked 

 at a fire during the night ; the temperature of the houses in the 

 morning, after the severest night, proving the absolute security 

 of the mode of supplying the heat under these houses. 



" The economy and simplicity of plan have also been proved by 

 Mr. Harrison having, previously to heating the second house, had 

 an estimate made by an eminent London firm, of the cost of the 

 apparatus for heating the house, the dimensions of which were 

 given. Estimate, 58/. Mr. Harrison objected to the estimate, 

 and desired to have another, with the plan of heating on which 

 the estimate was founded : this was 521. Mr. Harrison, disap- 

 proving both of plan and estimate, made, with Mr. Pratt, apian, 

 the iron for which was supplied by the same firm, and amounted 



