144 



TRANSACTIONS OF THE 



26th day of January, 1858, at the Crystal Palace, under the aus- 

 pices of the American Institute, 



DAN'L R. BOWKER, 

 WM. BUCHANAN, 



Committee. 



5 



7 

 10 

 12 

 14 

 18 

 20 

 24^ 



,34 



44^ 



48| 



Diploma. 



Honey Comb Heater. 

 J. C. Hoadley, Lawrence, Mass, 



For heating the feed water of steam engines, on its passage 

 from the force pump to the boiler by the exhaust steam. 



This heater received its name on account of its resemblance in 

 form and appearance to the honey-comb. It is, in effect, a tubu- 

 lar heater, or boiler, constructed, in the language of the claim on 

 which a patent was granted, "with the tubes, tube-sheets, or 



