The L'Anse sentinel. (L'Anse, L.S., Mich.) 18??-current, 1891-10-17
SCIENCE SCIENCE AND D. PROGRESS.
SOME RECENT psscovERIEs IN.
THE WORLD Or SCIENCE
New Kinks In ElectrIcIty--rrv
BY a Convict 0rindins without
OBSERVATION-DISCLOSURES to Cranks .
--Invsntlon of the Type e,ia-'
writer. :"
New Kiuks In ELECTRICITY

/
| In / ss5 there were three :electri,
roads in existence. with an equipment
of thirteen cars. There are now il
operation or under contract 325road'
with 4,Oo0cars and'6 daily oarryin,
capacity, Of a billion passengers. II
the United States the horse-car traffic
is carried on: Two-thirds by horse
power, one-fourth by electricity, one
sixteenth by dummies and one-twen
etith by cable. An average OF cos,
gives, per car; mile 1910 cents fol
horse, 1912 cents for electricity, and
14.1 cents for cable, 80 '.te-
'IYoU won't never haye no accidents
+ ifyou don't never. take no risks, was
the wise dictum. OF q witness of q re,
cent electrical accident. ~,
Experiment in fixing the longitude
/, OF Montreal, undertaken at McGill
College, necessitated the opening OF d
I circuit by cable and land lines to
| Greenwich and return. Some two
hundred signals were sent, and the
average time for the round trip OF
nearly 5000 miles was 1.05 seconds.
! An, English woman has written what
is declared to be the best popular ex,
/ position OF. the science OF electricity
} Vp. to date. She is Emma Marie
! Cilillard. 49,. ~, =. !. h. .e.., i
| Electric welding has been reduced to
I the utmost exactness in shops where
! formerly all the clumsiness OF fire
| welding prevailed. Leader I, water
I pipes may be welded but. joints on.
| The use of fiux is not necessary. ~
| THERE'S some question: whether the
Broadway road will ever run the
cable now going in. 1t is thought
that by the time the rope is ready
that an electric car far cheaper will be
/ on the market 3'"'. ta.r
An invention for factories enables
any personin dny part OF the. factory
to stop the main engine by the touch
ing OF q button, the Wire connecting
with the engine governor. In cases o.
mishap this is a very useful. DEVICE,
1 Photosraphins Speech. /,
The method of analysing motion. by
the acknowledgements (which, has
been So happily, applied by'M. Marcy
| in the case Of moving animals, such ns
horses running or birds and insects in
flight; has recently. been employed by
NJ. G. dDemenyI q preparation, at the
| physiological station. OF NJ. Marcy, to
examine the movements ofthe lips in
1 speaking. He has obtained results
which show that the form OF the mouth
is quite definite for the different
hrticulate sounds. With these photo
graphs combined in q zoetrope he has
reproduced the movements Of the lips
4 by, synthesis.' An ordinary person
finds it difficult to read the words bj
the, animated pictures; but q dea
| mute who has been accustomed ,tC
read from the lips OF q speaker finds il
easy to do the same from the photo
| graphs. "A young pupil Of the Nation
al Institute of Deaf Mutes in France
could read the vQwels and aiphthonSs
as well as the iabials. The first eS,
periments were, ofcourse, not oil that
could be desired, but In bringing the
matter before the Academy OF Sciences
| Paris, M. Demeny expressed the hope
that in continuing his researches he
Ilwould be able " to develop q new
Ilmethod OF educating deaf mutes by
l sight from more perfect Photographic
\ images. Obviously o magic lanterl'
lecture might be delivered to an
audience OF deaf Ihutes IN this way
i Grinding without Pressure. ~.
| In @ paper recently read before ths
Technical Society OF the Pacific Coast.
Mr.. John Richards referred, among
other things, to the system Of accurate
| grinding for calender POLLS, for papei
making, introduced numlhr ofyenrs
ago by j. Martin Poole, OF Whining
ton, Del.
These rolls, some of them seven feet
in length, had to be made for rolling
tissue paper, which will pile 1000 to
1000 to an inch Of thickness nnJ
variations OF / 10000 OF nn inch ir
diameter or alignment would distort
the paper rs it passed through til,
rolls. Mr.. Poole had exhausted tn,
emery wheel market, and ended by
advertising here and IN Europe fol
samples of emery and corundum. il
collected such samples and establish
| ed laboratory for experiment ant
the manufacture OF wheels, and, finally
after many failures, produced thos'
that would grind without pressure.
/ This was done by cementing tb'
wheels with substances soluble by sodi
wiYteK using the sharpest corundun
/ a,rnf,,Il,, a'e.artad Whav, The uhaai,