The Wheeling daily intelligencer. [volume] (Wheeling, W. Va.) 1865-1903, 1900-11-08
SCIENTIFIC MISCELLANY Al

u
Photographs on Glass = Varieties OF
Color Blindness-Flow of Marble.
The South PoleyThe Pound Of the
Romans - Chemical Coloring Of
Flowerp-Iife Z. Away from Man.
I Wood That Has Boon 'sMelted.n
Natures Photographic laboratory
may yet have many undiscovered won
ders. Continuing his researches with
silver, Major General ]. whitchouse
has found that valuable images are
formed on. exposing pure silver foils or
silvered glass to sunlight in vacuum
tubes and that the action is apparently
increased by watery vapor. Invisible.
blu e devclopable. images were readily
obtained, however, In exhausted tubes
showing no gigns otimoisture. A cur
ious effect upon glass has been also OBJ
served. A silvereh glass plate upon
whose uDsllvered surface a cut-out
screen of aluminium had lain for =
month In sunlight was put aside for q
few days In contact with the siyered
surface OF another piece of polished sill
vered glass. when the latter was found
to be impressed with an image OF the
design cut from the aluminium. The
Image was distinct and quite sharp. It
/. is concluded that Photographic effect.
may sometimes result from molecular
or physical change, although chemical
presence OF moisture or any oxidlzins
conditions.
-
The ordinary understanding Of color
blindness is Incomplete. Besides blind
may be short-sightedness and q weak
sight for them, the colors to some eyes
vanishing when still quite near, while
to others there Is only q dim perception
Of colors. DR.. Herbert Seager has mem
toned another form Of color blindness.
In this the vision Is normal by day. or
there may be even far-eightedness,
while at night colors can be dlstln-
guished at only a very short distance.
Signing is explained by Prof. Lums-
den as an effort to get oxygen. In mo-
ments OF worry or depression, resp!ra-
tion is greatly reduced, until the need
Of the lungs causes deep Inhalation,
followed by the exhalation that we
term q sigh. wi
Blast furnace tests have proven that
the coke REQUIRED to produce q ton Of
iron is from 200 to 800 pounds greater
when the air Is charged with moisture
than when 1t Is dry.
A study of the flow Of rocks under
uneven pressure has been begun by
Messrs. +. D. Adams and ]. T. N!col-
son, English physicists. Their flrst ex-
periments were made with pure cnrrara
marble. of which polished columns an
IN ,on-,b r,ra ,,,ocod l., -ro,,ht ,ron
+uha N. o,dv ., which, p,,-, lar, ,r,,
and nros.rro. nm n ooo ,tmo,nhorc,
rare ,,ar,o, ~ -, ~ a, ,.orr., ,,,,r
Gt,,, ,,a., ,,,,,o ~ r,,,. -, 800,
rro.eod = ,rd,n, -, TON no., t,,-,. =. aoo
dorreos r. ,n5 ~ am ,,,,-oe. q ard
mo,st marble ,t am d.,roc, e nh.
t,rna q, a,na-,n,o,t ,.,r,,,, h,,r,,,,, 20,
r,In,,ta. nd si-t,,-,Lo,,r d,r. 1,ndor ali
tha.a co,d,,,or.etho ~, rh,.. -r,,.sn,r-
r,,ncnt,,, 5nrorr,d Ito oo,r b.,,r lin
TINT ~ n,o,,Ie md /, como r.-ncct. ,Ito
that NJ el,cIors Tb. co,or va. Oh, orad
IN dead white thu .tr,nr,b be,nr weor-
ened more or les, according tn tho fine
reo,,,red for III, cb,r-o A. ord,no-y
in part to granular movement. and in
part to twinning and gliding In single
crystals comprising the rock; but at
elevated temperatures only the twin
ming and gliding took place. The pres
ence Of water had no apparent effect.
Inc southern magnetic pole Is now To-
Gated ut ~ degrees 20 twenty minutes
south anu l46 degrees west. SUCH ac-
-, US eNp ny"
~ So I,,,," ".e.a - eapS 1,ua. :,
-
-. ' '-..o' - .s'o,.e -"
SoSot - iai eoutH 10 1bout 20 uehISCo