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W. A. Norton on Ericsson’s Calorie Engine. 397 
the vertical pipe ¢, which communicates with the external air ; 
passing again through the regenerator, on its exit. 7 
‘The Regenerator is an admirable contrivance of Captain Eries- 
son’s for abstracting the heat, or the greater portion of it, from 
the escaping air and restoring it again to an equal body of air en- 
leting the cylinder, to repeat the work performed by the air 
Which has just escaped ; that is, for employing the same amount 
of heat over and over again. The regenerator consists of a large 
untber of disks of wire-netting, placed side by side, and in a ver- 
tical position, in a marginal frame by which they are held very 
nearly in contact with each other, (see the diagram.) Each disk 
issix feet high and four feet broad, the wire of which it is made 
sth of an inch in diameter, and there are tens of thousands 
of minute meshes in the whole extent of the disk. The num- 
ber of meshes in all the disks, added to the equal number of in- 
lerstitial spaces between the disks, make up, it is stated, over 20 
tons of minute cells through which the air passes and repasses, 
writs way to and from the working cylinder. In this way it is 
ght into contact with several thousand square feet of metallic 
surface, and parts with or imbibes heat almost instantaneously. 
It stated that Captain Ericsson estimates the time occupied by a 
Particle of air in traversing the regenerator at about ;;th of a 
“cond, and that this small interval of time suffices for the trans- 
of some 400° of heat from the escaping air to the wire, or 
‘the wire to the entering cold air. The clear opening for 
e of the air through the regenerator is about twelve 
Square feet, | ' es 
We are told that the escape or waste air deposits all of its heat, 
vith the exception of about 30°, in the regenerator, the ther- 
Mometer at m never standing more than 30° higher than that at 
L Briesson estimates that in the case of the stationary engine, 
i amount of fuel wasted in the process of transfer, was 0 
et hour per horse- d the entire consumption about 11 
2-power, and the entire Pp . : 
Iees. (See last number of this Journal, p. 286.) But it should 
: be observed that his calculation involves the supposition that the 
‘timated horse-power (60) was realized in the actual working 
the engine. 
of 
a g1 
bility of this, after we have considered the details of the per- 
ice of the engines of the Ericsson. — 
After the engine has got into full operation, and the regenera- 
bet reached its normal condition, there is a great difference 
‘ Ween ‘the temperatures of the inner and outer surfaces of the 
theeterator. We are told that in the case of the regenerator of 
The tionary engines this difference was never less than 350°. 
“© explanation is found in the fact that the heated air, on its 
