The Ogden standard. [volume] (Ogden City, Utah) 1902-1910, 1909-12-08
SCIENCE NOTES

IT is said that the problem OF seeing
over a wire has been successfully solved
by two Danish brothers who have bceg
working on the Idea for long time and
they nre at last In n position to rcYeG
the principle OF their invention TO the
lditor OF u Danish paper who, In max
lng the announcement. youches for iD
efficiency Transmission tnkeS place stimuli
taneously. so as TO reproduce any objects
Situated nj tho sending station In theh
pntural colorB and motions. tGclr dimeh
FIous, however. being reduced The ap
pIatus E Connected or contact witb
nhe telephone wire, when the acoustic
or optical currents can be thrown alter
pately through the line The operator ia
thus nble at will to show himself or not,
,ns desired.
The finest cement lie secured without
the use Of screens which cannot be made
Ono enough to separate these particles
from tho coarser material but the op-
Grafton Is performed by means OF fnn-
ming mill OF peculiar construction which.
without employing any Sieyes, delivers
product OF very dDe grain. The machine
requires much less power than the ordl-
nary machine, SO that very Bne cement
can be produced moro cheaply than COM
mon cement is produced by the usu1
methods
Most OF the processes recommended fol-
the extinction OF rats In quantities, such
as on shipboard or in industrial estob.
,lishmonts, are accompanied bv some Gle.
ment OF danger 10 human beings who
may hnvc occasion TO frequent tho same
premises Rats nro particularly dcstructs
I've on sbipbosrd and their determination
'ls rather difficult matter aud the use
Fof Illuminating or other gas Is quite
lllkely to result dlsaStrously to the MEM
hers OF the crew An inventor OF Berlin
hos devised Understanding appa-
rntus which has bcen tested under the SUI
perviSlon OF tho officials OF the Cbn-lot-
tenburg Electric Works. and it was found
Ia eGectuelly dispatch every rodent which
veDtured into II The rat Ia attracted
by two means; nn electric lamp excites
his curiosity and there Is also provision
made for some toothsomc morscl which
is out OF hts reach. however, and Is there
foro never consumed. The animal Itself
closes the current bound 10 kill II IN n
maximum OF 20 to 60 seconds Access to
the apparatus ls always free, even after
this has been Oiled with several electro
cuted animals. Ono OF the most interest
Ing features OF this scheme Is t6ot con-
tinoous. alternating, or threc-pbass cur
rents OF low tension. 10 to 120 volts. are
quite sufficient 10 elcctrocute the animals
Such currents are available Mt present
nearly everywhere, and especially on
bonrd ship. Should no electric installa-
ton be ovllnble, II would be sufficient TO
provide small accumulator battery,
which, IN spite of lts lower tension, would
produce quite similar effects. The oppa-
Ntus can be so arranged that the electro
cutcd animal itself signals its execution
to any desired place. advising the watch
man by ou electric bell or the lighting OF
q red incandescent lamp, that there arc
some killed animals to be removed. The
low tension OF the current excludes any
danger to men, and prevents any acci
dental clectrocution OF domestic animals
, A French oculist has given some special
attention 10 the study OF eye discomfort.
which is experienced by some persons az
ter watching a moving picture exhibition
auI be has given the malady the name OF
ciDematopthalmia. He has found thce
some eyes are not affected in the least
and thst others recover quickly. In some
cnScs the Asouoie Is avoided by giving the
eyes a rest for a few seconds immediate
iy after the hrSt shock, which takes place
ae room as the display has commenced.