NEW YORK HI h AID,
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Ro-NAcNETIsM-lt seems rotary engine on
this principle, has been going in Baltimore, since 1884
Mr.. Davenports laurels will be divided with several.
The truth is, this discovery must have taken place
The egg has been Matching by philosophers for twenty
years-now it is chapped and the animal is ready to
come FORTH the following is from the Batmere
American


An article appeared in the American of Tuesday
last taken from the April number of Sillimans same
rlcan Journal OF Science and Arts" giving descrip
ton of the Electro Magnetic Machine of Mr.. Thomas
Davenport of Brandea Vermont. Whatever may
be the credit due TO the nveS of the machine IN
question, from which we would not willingly detract
IN the most minute degree, II would appear that Mr
d. is not the first who has applied electro magnetism
to the production of rotary movement On the day
before yesterday, we attended, by invitation, with
several Others at the Hall OF the Academy of Arts and
Sciences, to witness the performance of machine
invented by DR.. Thomas Edmondson, OF this city,
and were most highly gratfed with the very salts
factory result which we saw.


The machine constructed by DR. f. is called the Ro-
tatlng Arma,ures, and is attended stated by the
inventor to produce the rotation of set of arma-
lures by causing current of galvanism to pass, at
certain times through an eecIro-magne pac d near
the circle described sy their revolution. The eamatures
attracted by the induced MAGNETISM as they APP
proach the faces of the electro magnet and by the
arrangement OF the instrument, the of galvan
ISM is suspended and OF course the induced magnetism
withheld as the armatures recede from the electro
magnet The armatures are nicely fixed upon an
axis and made to descend parallel to the faces OF the
magnet and, as they are attracted and suffered to
pass, the momentum which at the time of passage is
only left, brings the other into action"


At one end of the instrument electro magnet
composed OF soft iron wrapped with copper wlre AT
the other extremity placed the axis to which the
natures are attached, at one end of which axis is
brass wheel that revolving in small trough contain
ing quicksilver preserves the connection entire whilst
at an equal distance from the other end of it is fixed
STAR the points Of which they revolve dip in
cesslon into another trough charged with quicksilver
During the time that the points OF the miners
ed the connection being perfect the attraction of the
magnet is suspended but as the points emerge from
the mercury the attraction of the magnet is restored
and thus the motion IS preserved The action of the
teal, and the velocity seemed capable of being in
creased to any given degree. So soon the plates
of the galvanlc battery immersed in the acdulated
WATER It's influence commences 10 operate on the
chine, which is placed within its circle. Nothing
could be more beautiful than the exerton of power
thus produced by unseen agent.


The most remarkable circumstance attending the
invention Of our highly gifted townsman is that de-
scnPuon Oft was sent to DR.. Silliman previously
to April, 1894, accompanied, we believe, with ma
chine to exemplfy the effect produced which descrip-
ton may be found in the number of the Drs Journal
for April 1884, page 2o5 How, therefore the learned
Professor in his remarks upon Mr. Davcnports ar
rangement and others mentioned in the article refer
red TO- should have overlooked that of DIR. Edmond
son, 1t is difficult 10 discover particularly he had
been the medium of publication of the discovery Of
that gentleman SO far back as 1884 Not having seen
the machine prepared by Mr.. Davenport we can only
remark that the one presented to our inspection by
ence Of the galvanic fluid that was most surprising
and worked with velocity that excited the admira-
ton Of every one who fortunate as 10 be pre-
sent.