EXPLANATION OF THE PLATES. 
401 
The engines are 250 horse power, and the following are the principal dimensions: 
Diameter of cylinder 
. 4 ft. 8 in. 
Length of stroke 
5 
6 
Diameter of wheels. 
23 
0 
Length of paddle boards . 
8 
6 
Breadth of ditto 
2 
l 
Diameter of funnel . 
4 
0 
Length of funnel above deck . 
36 
0 
PLATES LXXI. and 
LXXII. 
BEALE’S PATENT ROTATORY ENGINE. 
As many fruitless endeavours have been made at various times to construct 
engines on the rotatory principle, capable of performing their work regularly and 
efficiently, as well as economically, we beg to submit the present description of Mr. 
J. T. Beale’s invention to the attention of our readers*. 
The several figures in plates LXXI. and LXXII. represent different views of this 
engine (of 8 horses’ power) and its parts, drawn to a scale of 1 inch to the foot. 
Plate LXXI. Fig. 1 is a plan or horizontal view of the engine complete, show 
ing the general arrangement of the whole; but as very few of the working parts 
peculiar to this engine can be seen in this or either of the other external views, we 
shall not particularize any further, until we come to the sections, thinking it rather 
desirable, in order to preserve simplicity and perspicuity, to confine ourselves in the 
first instance to the mere citation of the several parts, each with its respective letter 
of reference, as follows, viz.— 
a, Shows the foundation of the engine. 
b, Is the band wheel. 
c, The entrance steam pipe. 
d, The cylinder. 
e, The exit steam pipe. 
f The cam, or wiper, by which the slides are worked. 
g g, The slide rollers. 
* The precise claims to novelty urged by the patentee may be seen on referring to the specifica 
tion of his patent, inrolled in the Inrolment Office of her Majesty’s High Court of Chancery, August 
27th, 1835; for although, in the present engine, several of the parts have been modified and im 
proved, still the principle is the same. 
3 E