The Republican. [volume] (Oakland, Md.) 1877-current, 1881-04-23

sets up lively tune, and when its mo.
tive power is sought it is found in tiny
motor three inches square, run by cleo
tricity, on the bottom shelf of table in
the window. A ray of sunlight break
ing through mass of clouds strikes the
bulb of a little glass case, and starts into
motion little instrument for measuring
the heat of the light of the stars. Edi-
son also has one of these. One side OF
the delicate fans, composing q sort OF
wind mill wheel, is composed of plat
inized silver, while the other side is car
BOMBED. -7ga aenis -nafuq4., y5.l
! Upon the next shelf of the little ebony
table is nickel plated motor, twelve
inches long and four inches wide,
which, although almost noiseless, runs
the sewing machine up stairs, and sets
a small regiment of toys to dancing in
the nursery. A battery of three sui
phate of copper cells runs the motor six
months for household or other purposes,
at cost of ten cents month. At
tached to an exhaust pump, which is
used as an aspiratcr, the tiny machine,
that may be carried in an overcoat
pocket, does the work of two assistants,
when it is needed to assist its owner
professionally A large Holtz machine
sets chime of six bells to ringing. The
turn of a switch starts self-feeding
scroll saw by electricity. 9 n}t .ja7
Asked topick w two innocent-appear-
ing sponges swinging from a table, the
visitor gets an electric shock from a
machine in perpetual motion. Curious
to look at book, the visitor opened a
door, and at once the burglar alarm
sounded. A photograph on the table
will probably be some day produced in
court as a witness. 1t has a better aoa
hlnlGnG tone than Edison's, as the
metal base is hollow, and therefore reso.
nant, and the mouthpiece, which is adj
justed by Edison to different voices
with rubber, is by DR.. St. Clair regu
lated by screw. Although Edison first
invented the photograph, he was neck
and neck with his old schoolmate on the
quadruplex telegraph machine He,
| however, got his patent and fortune
The model made by DR.. st. Clair is in
his curious collection. There are forty
five batteries in the DOCTORS study, and
nearly all of them have something to
do. A curious instrument made in
Paris, and only duplicated in this coun-
try, it is said, in the collection of DR.. w.
A. Hammond, throws stream of water
so fine and strong that it penetrates the
flesh like knife. 1t is used in treat
ment of sciatica. There is cautery
battery, with $500 worth of electrodes,
by which platinum wire, heated to white
heat, is used to remove excresences /;
and there is a curious machine worked
by battery which is infallible in detect
ing curvature Of spine. rr gro
Perhaps the most attractive piece of
mechanism in this curiosity shop is a
double electric motor of eight magnets
and sixteen armatures, with four shafts
running to common center, where, BY
a complex system of wheels, they re-
volve two horizontal shafts, one inside
the other. Two six-inch wheels, one
inch apart. reyolve in an opposite direc-
ton over the shafts. The whole ma
chine, which is of the physicians own
manufature, as are most of the things
| described, is constructed to. produce
constant currents passing in, opposite
directions. Its practical application is
important in surgery, especially in the
rapid removal of cataract from the
eye. A large nickel-plated motor on the
Doctors table runs lathe when he is
at his mechanical work. He can turn
out a screw for his watch while he is
waiting for meal. gear a2HoNi'.
By a wire from his burglar alarm DR..
Stellar has made it easy to turn on the
gas to each separate burner of his chan
delier, and light it by electricity. AS
long as the shut-off cock is turned, a
constant spark passes over the mouth of
the burner, and it is impossible to blow
the gas out. ..... ....,..' ....;....... 49,!
DR.. st. Clair expresses the belief that
electricity will yet produce revolution
in domestic economy, and that it can be
made more useful servant than it is.
There is no SCIENCE = he added, i" to
which the inventive talent of the young
can be turned which promises more.
The city's lights, if not electric them
selves, should be lighted and extin-
guished by electricity; fires should be
announced by electricity to those who
live in their Immediate vicinity, and not
only to those whose duty it is to extin-
guish them; there should be, under
groud cables with which householders
should have the privilege of connecting,
for burglar alarm or other purposes,
just as we connect with gas and water
mains. "--Ne0 York Sun. .u,ey rf