Richmond palladium., 1849-10-17

: departed Mary Mahony.
i'ron! t.lc Indiana Journal.
gs.tIi,Nk-s Electro
Engine.
\ short time since number OF scicnti-
nc gentlemen, by request. made an ex-
animation Of Mr. Unihank's magnetic
machine. constructed for the purpose o.
ascertainlng the practicabili'v of obtain
ing more than one current of electricity
clearly that machine may be constructed
upon the principle Of his. for generating
any number OF currents that may be de-
sired. without incre asng the resistance in
nltaing Ike proportionate degree.
The following is an expression given
by those gentlemen acer having made an
examination Of the machine. and receiv
Ing an explanation of his plan Of increas-
ing the number and power of the cur
rents 10 an indefinite extent, and his mode
OF applying them as propellng power:
The unlers gncd. at the request of Mr.
Jnthank. have examined the above nam
ed invention. and received his explanation
Of the manner in which he proposes to APP
ply electricity TO the propclling of ma
chlnery; and. so far they can form an
opinion. ARE impressed with the belief that
it is susceptible of successful application
in the way he proposes. His mode of
applying it for motive power is ingenious.
and would seem to be entirely practicable.
The material fact alleged by him-that
in generating the currents. upon the num-
Der and strength of which depends It's
power of useful application, the resistance
IS moi proportionate1y increascd-is made
entirely obvious. Altogether we regard
the invention as most Ingenious in itself.
and if further trials upon more enlarged
scale shall confirm the favorable impress
sion derived from careful examination Of
the model submitted. the Importance OF
the discovery can scarcely be over-esti-
mated We would at least commend the
subject to the serious consideration OF
those disposed 10 encourage the attempts
of genius at discovery and invention
!. S. BoBBs. NJ. ID.
). l.. MOTHERSHEAD, NJ. ID.
J.. DUNLAP. NJ. ID.
t. X. SULGROyE, a. Il.
J. :. HARRISON, NJ. ID.
w. HANNAMAN, Druggist.
Il. \. NORRIS, Civil Engineer
Since the above examination was made.
a committee was appointed, at a meeting
of number of the citizens. to make a !
further examination. The examination
was principally made upon the part of
that committee by Prof c. c. Downey,
Capt. I. A. Morris, and L. Munsen, MD.
In the course of their examin atoms a I
number of experiments were made, which
resulted much more satisfactorily than
was by any anticipated. In testing, with !
an electromagnetic instrument, the rela- /.
tive magnetic propelling power between
one of the currents generated by Mr.. Un-
thank S machine, and a current from an
energetic Groves battery, (the best form
known) charged with fresh, strong nitric /
acid IN the porous cup, it was found that
the current from the machine was just so
per cent more powerful than the battery
is. it would raise weight
in given time just fifty per cent. greater
than the battery current would raise. II
was ascertained beyond doubt that as
the number Of currents is increased, upon
his plan Of generating them. (the genera
tor revolving with the same Velocity the /
power OF each Individual current is in
creased. not in the same, but a greater
ratio. that is, if the number of currents
doubled. the power Of each individual .
current is more than doubled.
From estimates made by Professor Dow
ney and Capt. L. A. Morris, based upon
actual experiment with current from this
it was estimated that a machine
upon the same principle of
his. for generating twenty-four currents,
the generator revolving with the same
velocity as in the experiment. should give
4 power sufficient to raise weight Of 28,-
300 fbs. one foot per minute. 1t could no.
equire one-half Of that amount of power
applied upon a wheel. fixed upon the shaft
If the generator. as proposed by Mr.. Tn
hank. TO give the generator the required
'eloci'y; the only material resistance to ,
re overcome being the weight upon the {
ha!t of the generator, and the resistance
# the atmosphere. If the velocity Of the
generator be doubled, the power Of each
Individual current would be more than /;
loubled. as was proved by the following q
experiment.: By causing the generator to b
evolve slowly it required ESQ revolutions !
! the generator to raise weight given .
istance in a given time; by increasing S