to the Boilers of Ordinary Steam-Engines. 335 
“The continued:passage of high pressure steam (genera- 
ted as above) through the tube z, heats the water, which 
occupies about half the interior of the boiler, and by that 
means a sufficient quantity of Steam may be produced in the 
boiler for working an engine of the ordinary construction, 
and with a very important saving in the quantity of fuel, 
compared to what would be consumed, to effect the same 
purpose, by any other plans heretofore adopted.” © 
** Now, whereas the materials of which my said improve- 
ments are constructed, and the exact proportions of’ the 
relative parts, are not subjects for which I hereby claim ex- 
clusive privilege, though I have described those materials 
lege is hereinafter made. And whereas, I have only repre- 
sented in my said drawings annexed, such parts of a steam- 
engine as comprise my said improvements, the various 
mode of applying such said improvements, by means of the 
steam-pipe being too well known to require particular des- 
cription here. 4nd whereas, my said generator may be 
heated by a variety of known furnaces, I have not described 
any one in particular, but the one I have used and found to 
be the best is one of the cupola kind, fed by a blast. 
And whereas, I have described in my said drawing, Fig. 1, 
a safety-pipe and indicator, and a forcing-pump, neither of 
which are in themselves new, but which apparatuses, or 
ination necessary to my said 
Similar ones, constitute a combination 
*: Secondly,—For causing such water, or other fluid or 
fluids, so aan as aforesaid, to escape from under the said 
