Frostburg mining journal. [volume] (Frostburg, Md.) 1871-1913, 1886-08-21
STUDY AND WORKSHOP.

apeecnes, court proceedings, debates,
etc: Ike principal difficulty now re-
manning Is to secure the distinction of
tone 4e voices, so that tho various
speakers may be recognized by the
TRANSPORTER. When this is accomplished
one OF the machines may be taken into
court and all the proceedings will be
recorded by it. At the close of the day
u can be carried to q room and gagged
to talk at any rate of speed-at thirty
words minute, for INSTRUMENTATION
can be written out by an ordinary short
hand writer. If it is desii ud to get the
proceedings transcribeo as fast as they
4 occur new cylinders arc put in the
! monograph as fast as tho proceedings
4 are written out. For instance, the
iong-l hand writers can put in cylinder
A and let 1T remain ten minutes; then
A take 1t out AEd put IL another, and
transfer tn, cylinder which has the
proceedings upon it to another instru-
ment, whic h is made to repeat the plo-
ceedings W It'll accuracy, and at the ~.
piratlon o. its term the first cylinder ia
replaced in the phonogra Ia and the
other cylinder taken FROM it, and SO on.
IN the deep stiffness if ono listens to
! family heard sound, like that OF the
ticking of watch, it will DO notice |
that at irregular intervals the tones are
wholly inaudible, while at other times
they are distinctly recognized. Signor
Ras ,gi, an Italian scientist, has ascer-
tar led 10y experiments on different per-
sol is that the intervals of silence usual
ly vary between seven and TWENTY-FIVE
,conds; while the periods of sound
PERCEPTION are between seven and
eleven seconds in duration, with a
maximum of fifteen. He also for.n,,
that the variation was not due to OK
{ Sraneous sounds nor to the blood cir
! culatlon or respiration, and COP clules
that it results from the ina,oIlity to
keep the attention for long periods at
sufficient degree of tens ON for the Der.
ception of faint sounds, OF possibly t /,
a variable physiological receptivity in
the auditory nerves.
EXPERIMENTS Nude under the drec-
ton OF the admlp lstration of the Dut,
state railroads with various paints Oh
IRON plates arr reported to have proved
that the rei-lead paints res st atluo
sphere m,Iuences much better than
those OF brown-red and iron oxides
The reo.-lead paints adhered closer t.
the metal and possessed greater elias
ITCHY than tho others. 1t was SO
found that better results were attained
II, before the paints were appl ed, the
plates were picked, instead of bein
merely scraped and brushed. The
test-plates We're picked in muriatic
acid. washed with water, thoroughly
dried, and while warm carefully ole,
! GLASS flooring is being increasingly
substituted for boards in Paris, this
being especially the case in those bust
ness structures where the cellars are
used rs offices. At the bank of the
Credit Lyonnaise the whole of the
ground in front is paved with large
s4uares of roushened glass imbedded
IN strong iron frame, and in the eel
lars beneath there is sufficient light,
even on dull days, to enable clerks to
work without gas. Although its prime
cost is much greater than that of boards,
glass is in the long run far cheaper,
owing to its almost unlimited dura-
bility.
| BY a new process of manipulation
mats more serviceable and finer than
anything now on the market are made
OF wood pulp. They are impervious
to water, and not wanting in hexibility.
1t Is CLAIMED that felt hats will have to
take back seat as soon as these new
hats can be placed in the market in
sufficient numbers to supply the de-
mand. They arc certain to revolution
lZo the hatter's trade, rs they con lie
nodded into any shape or style desired,
and colored to meet the taste of tho
public. They can be made to repre-
sent glossy OF happy appearance.
A NEW concrete now being used
| quite extensively in France is composed
OF eight parts sand, gravel, and peb-
blcs, one part powdered cinders, and
one and half parts unslaked hydrau-
lie lime. these materials are thor
oughly beaten together, the mixture
forming concrete which sets almost
Immediately, and becomes in few DAYS
extremely hard and solid. 1t may be
improved by the addition of one part
! cement.
| SINCE the recent death of Prof. Z.
Llnnemann, of rague, o description
| of q new metallic element has been
found among his papers. The metal
was obtained from the orthite of Aren-
dial, and is named Austrian" 1t may
tn ow new light on the constitution of
the sui, as one OF its spectral lines ap-
pears to be identical with one of the
,, three rlnident fed lines in Angstrom's
map of the normal solar spectrum.
The employment of negro slaves was
begun through motives Of humanity.
Seeing how cruelty the Spaniaru.
worked the poor natives in the silver
mines, not long after the discovery OF
America, priest named Las Casas, out
of pure benevolence, recommended the
employment of negroes because the,
were stronger than the Ind ans. If III
could have foreseen what his ADV,
would lead to he would probably hay
kept it to himself.
In order to enforce some kind OF
regu' arity in BARRIERS shops, which
\ were once places of great resort for the
4 idle in England, certain laws were
| usually made, the breaking of which
| was to be punished by forIeits. Like
| q good many laws of the present dav