Evening star. [volume] (Washington, D.C.) 1854-1972, 1892-12-31

From these the growth of the art will be fol-
lowed down To the modern magazine breech-
loading rte. automatic guns which discharge
thepiseive-. each sbrt setting of the next cart
ridge. ami The Hoichkiss revolving cannon.
Which throws continuous hal OF six-pound
bullets from the rail of ship. An oddity is
the Lyman accelera.ing gun, which has little
chambers all along the tube. These are filed
with powder and are discharged as the pro-
jectie is leaving the weapon giving the latter
additional impetus.
TYPEwRITISG MACHINES
Another interesting group illustrates the
growth of typewriting machines. The earliest
model and the record respecting ii were de-
s:roced by the fire OF 1886. so that the series
begins with the second one, which represents
the invention Of C. Thurber in 1912. Though
very simple, its operation is extremely slow.
The type keys are arranged around the periph-
ery Of a horizontal wheel, by revolving which
each key Is brought to the same point and
iabbed downward through tube upon mar
row ribbon Of paper which passes over q
smaller vertical wheel beneath. The result looks
like modern ticker" telegraph message. but
II would take long time to write a few words.
Specimens OF recent typewriters have been sup
Piled by the typewriter companies. Together
with these Is shown the first and only real
writing machine. II Is most elaborate con-
trivance, holding pencil against fixed sheet
OF paper in such a manner that the operator il
able to make the pencil write on the paper by
moving a set OF handles. The process is ever 40
much more difficult than writing with n pencil
held In the fingers. and that is probably why
this peculiar device has never come into gen.
eral use.
AGRICULTURAL MACHINERY.
One Of the most important classes comprises
reapers, binders and other harvesting machines.
1n6e NIL i'm -
office up to 1877 were destroyed BY the fire Of
that year Accordingly. there were no models
Of this kind for the exhibit save those sent In
from 1877 to 1880. after which latter date the
patent office no longer demanded models from
inventors. In order to illustrate completely
the progress OF invention in this line many
models havo been constructed to represent
early types, and manufacturers have been
appealed to for reproductions in miniature
OF recent patterns. The Mccormick Company
OF Chlcngo is preparing seven models showing
their harvesting appliances. The growth Of
each sort will be shown by itself For example,
the development Of the threshing machine
from the simple fail will be exhibited by mod
els of fail machines worked by hand, and
finally by small copy OF the modern machine
which beats the wheat or OATS lets the grain
fall through screens and throws away the straw
ELECTRICAL INVENTIONS.
The series illustrating the growth OF electri-
cal invention will be one of the most remark
able. Telegraphic instruments will be shown
from copy Of the original Morse machine
down to the gold and stock Geographic printing
apparatus and the autographs telegraph. BY
which person can write in his own handwriting
at distance Of 1000 miles. Mr.. Bell
will supply telephones showing the growth
Of that device from the primitive tele-
phone of 1876 to the newest improved pat
tern. Edison will contribute models of his
monograph in the various stages of it's devel-
opment, beginning with q sheet Of tinfoil
wrapped about lockwood cylinder and wind
ing up with the perfected talking and musical
monograph graphophone. Electric motors
will be included in this group from the Daven-
port motor of 1887 down to the very latest
motors, which will be represented by models
from the manufacturers.
THE PROGRESS OF BRICK-MAKING
will be shown in like manner, from the primi-
tive method of filing molds and emptying them
by hand to the modern machine, by the aid of
which n single man is able to turn out hundreds
of thousands of bricks in a day One Of the
most important industries of this country is
the manufacture of boots and shoes There
will be a full set of models of machines en-
ployed from early times for this purpose. For
tunately these were not destroyed BY the fire of
1870.
ENORMOUS LABOR.
The labor Of organizing this exhibi. of the
patent Office has been enormous To begin
with all the models on hand we're carefully gone
over and assorted. Naturally. most of them
we're In o condition of greater or less dilapida-
ton. Twenty-Five skilled men have been at
work on them for months repairing them
and cleaning their metal parts until they look
as If they were brand new. The series which
they afforded were very incomplete. and the
gaps were filled by building fresh models and
by applying to manufacturers and inventors
Many Of the latter were dead, adding diff
fculties to the task. In this way and by
patient effort the series were made complete,
and the models now being boxed
for shipment to Chicago. When dis
played at the exposition each of them
will have an explanatory card attached
to it, SO thai one who runs may read what the
collection signifies. 1t is expected 20 be one Of
the most interesting features OF the fair and
nobody who views 1t with thoughtful eve can
fail to be impressed with the wonderful and in
spring thought that the creative human intel
ligence is in truth spark of divinity.
RENE BAcHE.