W. A. Norton on Ericsson’s Caloric Engine. 395 
elevated,) by means of a connecting rod passing from the nearer 
end to the crank of the paddle-shaft. The two connecting rods 
are attached to the same crank-pin; and the relative position of 
the shaft and working beams is such that each of the connecting 
rods has a mean deviation of about 45° from the vertical position, 
and when one rod is passing the dead centre the other is acting 
upon the shaft with the maximum leverage. 
From what has been stated, it will be seen that in studying 
the essential theory of the new engine, we may confine our at- 
tention to one of the double cylinders with its accompanying 
mechanical arrangements, which taken together form one single 
acting engine. ‘The essential parts of this engine are shown in 
the annexed diagram, which is a copy of Ericsson’s representa- 
| | ee 
i  § ten. « sia 
b 
hese are, respectively, the 
tion of the stati ine, 
Or the stationary epgine. 
wee piston rods; the furnace ; 
ouble cylinder, with the pistons and pis' 
a large coy eA by pipes with the top of the sup- 
Ply cylinder and the bottom. of the working cylinder, called the 
eter ; and a piece of apparatus placed in the lowermost of 
ese pipes, called the Regenerator. The working piston in the 
engines of the Ericsson, has a diameter of 14 feet, and the supply 
'* Reduced from a plate in Appletow’s Mechanics Magazine for February. 
