118 Notice of the Steam-Boat Babcock. 
than the arrangement of the tubes, and their connection with 
the cylinder. 
A B, fig. 3, shows a portion of two of the tubes, connect- 
ed by the double elbows, and in fig. 1, the whole of the el- 
bows are shown by the letter A, as they are arranged in the 
furnace, the tubes themselves being concealed within. C and 
gine. G is the axis of the wheel to which the shackle bars 
are attached; upon it is the eccentric H, which moves the 
forcing pump E; there is a similar forcimg pump upon the 
other side of the furnace, for injecting the water into the oth- 
er generator, moved by another eccentric, upon the same axis 
G, but geared so as to work alternately with the other pump. 
ser, the reservoir for the water, and a front view 
of the furnace, it is not thought necessary to show, as the 
plan can be understood without it. ‘The method of convert- 
ing water into steam, by injecting it into a generator, previ- 
ously heated, has been, I believe, many times attempted, but 
invariably failed. Mr, Babcock’s claims to originality, con- 
sist, therefore, merely in the method of obviating the cause 
of failure, and that is done by using two generators instead of 
one, and by having the water injected into them alternately, 
so that while one is in operation, the other has time to regain 
its exhausted caloric ;_ and he thinks that if the two generators 
were ceunected with each other, so as to make but one, and 
of course the injection of water constant, that they would cool 
faster than they could be heated. 
e public, however, will rest satisfied with their success, 
without troubling themselves about the cause of it. ere 
are a number of boats building for the Hudson, the Connec- 
ticut, and this bay, which will be in operation in the spring. 
Very respectfully, your obedient servant. 
JosepH H. PATTEN. 
