Reports of Judges. 85 



are inclined and connected at the ends; the arrangement has large 

 heating surface, readily repaired, and in our opinion a safe and 

 economical generator of steam. 



Davis' Safety Steam Superheating Boiler, No. 1183, is a simple, 

 cylindrical, vertical tubular boiler, with cast iron spheres, located 

 upon the top. When in use, these spheres are surrounded by the 

 escaping products of combustion, by which the steam is super- 

 \ieated, the steam passing through the whole system of spheres; 

 the arrangement for superheating being simple, and efficient for 

 the purpose, and easily accessible for repairs. 



Symmes & Hayes' Cone Boiler, No. 1529, possesses the feature 

 of using cones in the fire chamber for increasing the heating sur- 

 face. Pipes are inserted in the lower ends of the cones, passing 

 out through the sides of the boiler, and again under the furnace 

 in the lower water space. 



The boiler is vertical and cylindrical in form, and an efficient 

 steam generator, but the arrangement more or less liable to rapid 

 deterioration. 



APPARATUS CONNECTED WITH STEAM ENGINES AND STEAM BOILERS. 



Knowles' Boiler Feeder, No. 572, is a very efficient and valuable 

 instrument for feeding and regulating the supply of water to 

 steam boilers, is automatic, and an important adjunct to stationary 

 steam boilers. 



While we entertain an opinion, highly favorable to the value 

 and great merit of this apparatus, and in thus expressing it, we 

 are fully sensible of the objection urged to automatic apparatus, 

 having for its object the all important question of the supply of 

 water to steam boilers, involving as it does the serious and calami 

 tous results in the event of failure. 



We believe this apparatus the best heretofore brought to our 

 notice, and highly meritorious in accomplishing the object for 

 which it is designed. 



Clark's Steam Fire Regulator, No. 1196, is a valuable and effi- 

 cient instrument for accomplishing the object for which it is 

 designed, and highly meritorious. 



CALORIC ENGINES. 



Wilcox & Co.'s, No. 1291, was the only caloric engine brought 

 to our notice. 



This engine is single acting, and receives the air through the 

 furnace chamber before it enters the cylinder — is novel in this par- 



