Bismarck daily tribune. [volume] (Bismarck, Dakota [N.D.]) 1881-1916, 1907-08-16
EYES, EARS AND M NOSE
Curious Facts About These Or
qans OF The Human Head.
PEcULla is OF The Il. :.

The Ball Is Covered With 9 i oughs and |
Elastic Coat, and the Pupil ls a Deep
4 Hole Filled by a Transparent Lens.
The Nerves of the Nose.
Did it ever occur to you to inquire
why the eyeball Of the eye Is white?
The reason is rather curious. The
blood vessels which supply Its surface
are SO fine that they do not admit the
red corpuscles of the blood.
The eyeball is covered with a coat
known as the .sTunica scleroticats'
which is amazingly tough and elastic
and covers the entire ball with the
exception of the part behind where the
optic nerve enters and Of the cornea
in front. The pupil Of the eye Is q
deep hole filed by a transparent lens
and fitted with most exquisite ar
rangement of muscles which widen it
when the light Is dim and narrow 1t
in a strong glare.
DO you know that you have a blind
spot in each eye? That is, q small
portion of the retina Is incapable Of
exciting the sensation of vision when
| it receives the image Of an object.
This blind spot corresponds with the
| artery lying in the center of the optic
nerve. BY a wonderful provision of
| nature the blind spots do not CORE
spond when the eyes are directed to-
ward the same object, SO they cause
no Inconvenience, and few beyond doc
tors and opticians are even aware Of
their existence 3ss#
4 Practically all persons are right or
left eyed, although they may not
know II. One eve is nearly always a
/ little stronger than the other and con-,
seauently IS used more. OF course the
difference in many cases is SO great
1 that It has to be rtificialIy corrected.
i In many cases, too, the pupils OF the
two eyes vary quite considerably In
size. l
Shortsig htedness, 1t has been proved,
Is more common among people with
light colored eyes than those with
dark. AT the same time, among gray
eyed persons are found those with the
most powerful sense of vision Of any.
Muscular fatigue Of the eye can be
measured by the number of fnvOlun-
tary eyelid movements, or blfnks, made
i per minute Read by eandleHght or
other insufficient Illumination and you
viii, find yourself blinking seven times
i minute. In ordinary gaslight you
i blink about three times a minute, but
4 If you work in softened daylight or by
4 powerful yet shaded electric light your
4 eye tires so slightly that you do not
q blink more than once In thirty or thir-
a ty-five seconds.
The eyelashes give most useful aid
in shading the eyes. The average per-
3 son has 100 or $50 hairs on the upper
\ lid and so or 100 on the lower, or;
say, $50 to 500 lashes in all. q,
The eyeIashes are not permanent.
Il They are constantly failing out and
4 growing again and are entirely re-
newed at least three times a year
/ Along their edges the eyelids are pro-
vided with little oily secretion. just
sufficient to keep the tears, which
wash and keep clean the eyes, from
overf1owing
q Eyebrows which grow thick and
dark are very sure sign Of a good
constitution and physical endurance
+ If they are lighter than the hair, they
indicate lack of vitality.
The nose, SO far as appearance goes
is the most important feature Of tn
face. and few people are aware q
how much It's eventual shape depend
on character and profession. At ten
boys nose may be d pug pure ant
/ simple. at fifteen 1t may be almos
Greek, and at twenty It may hav
4 developed a powerful bridge; and be
8 come practically Roman. Almost ey
cry great general who ever lived, fror
s Alexander the Great to ellington an
4 General Grant, had a Roman nose.
81 1t is to the delicate nerves Of sme
Il In the nose that we owe our apprecis
q lion OF well cooked dinner and fin
4 wine. The palate has comparativel
81 little to do with It. ...& s3ss
q we have no special reason to
8 proud Of our ears. The human ear
q Infinitely inferior to the movable, flu
mel shaped ear trumpet possessed |
d the horse, by cattle or even by the ra
bit or hare. Both men and apes ha'
lost the power Of moving their exte
nal ears. and there are many sound
# such as the squeak OF a bat, which a
81 absolutely beyond the compass Of +
human auditory apparatus. There
s. one peculiar point about the ears.
"a ali our features, they are those mo
likely to be exactly similar In size Al
shape. II
81 We have already mentioned that Z
two eyes OF one individual are We
"A seldom alike The same may be SO
of the face as d whole. Only 2 p
81 cent OF the whole human race are pt
sessed Of absolutely symmetrical fac
In seventy four persons out Of by
dred the. left side Of the face Is lara
81 than the right; In twenty four I
# fright Is the larger; in two the two SD
~ are similar. Next time you visit I
photographers. remember this fact @
$ ss,5a ~ xv,,,yo 8,,,.s,f3Ia uy;sl 1anly tafl