The Abbeville press and banner. [volume] (Abbeville, S.C.) 1869-1924, 1899-06-14
POPULAR SCIENCE.

Free hydrogen is found by NJ. Ar
mand Gaut1er to be common con-
,tituent of the atmosphere. The COM
oustible Hydrocarbons of town air do
not appear in the air of the open sea
or of mountains, but pure mir contains
:ree hydrogen equal to about half its
:arbonic acid.
The hot season around Manila e1-
tends from March to June, May being
The warmest month, when maximum
temperature of eighty-si1 degrees to
100 degrees in the shade IS expert
snced. The coolest weather occurs in
December and January, when the
temperature varies from sixty to six
tJ-fve degrees to seventy-fve,degrees.
The best weather is found from NJ
vember to February, when the air is
cool and the sky. clear. At this time
woollen clothing is worn IN the morn
ing and evening.
Protective mimicry, that cunning
uevice of nature to preserve animals
from their enemies, is we'll shown in
the eggs of certain fishes notably the
Californian shark, know as Gyrop-
leurodus francisco. The shark is of
sluggish habit, lurking among rocks,
and it's dark egg resembles q leaf OF
kelp or seaweed folded up spirally. 1t
is deposited among the beds of kelp.
md clings to the leaves by the edges
of the spirals. The young shark
oursts open the end of the egg and
swims away. Another sharks egg of
:he Pacific Coast has tentacles, which
clasp the seaweed, and elso initiate its
appearance.
Among the Investigations conducted
by Professor E. Dorm on subjects con-
nected with the Rontgen rays, has
been O series of experiments to de.
termine the sensitiveness of totally
,olor-blind person to this form OF
radiation. According to his theory,
the light seen when the eye is ex-
posed to the rays is due to peculiar
aptitude of the eyes for these rays,
and not to Auorescence in the retina.
The light excited is greatest at the
periphery of the eye, seeming to indi-
cate that the rods of the eye are sensi-
tive to the Rontgen rays. The cones
also were found to be sensitive, and
there is no central blind spot in The
totally color-blind eye which is in
sensitive to the rays. 1t is believed
by Dr.. Dorm that the hypothesis that
total color blindness can be ascribe!
either to failure or to the aptitude OF
the cones of the eye may be disproved
by these experiments.
We should hardly expect to- have
handsome and accurate portrait bust
of all upperclass lady from Neolithic
times, says DR.. D. G.. Brinton, in
Science. But the marvels of science
do not diminish. At the last meet
ing, in August, of the German Asso-
citation of Physicians and Naturalists,
Professor Kollman, of Basel, exhibit.
ed the bust of female whose skull
and portions of whose skeleton had
been exhumed from Neolithic grave
in one of the caverns in Southern
France. The principles of the recon
struction, rs we'll as modern examples
of the method, prove its accuracy.
The soft parts Of the head and chest
can be restored without risk of error.
The Neolithic dame was rather good.
looking, and presented the undoubted
features of the white race, demon.
strating, as Professor Kollman insist:
ed, that empires may crumble and
States decay, but the essential feat
ures of each human race persists in
definitely and unchanged.