Idaho semi-weekly world. [volume] (Idaho City, Idaho Territory) 1875-1908, 1892-03-29
colon HIIlI'S
VOW eyTsIeH1 i H.,
ROAD eHysIcIA,ss, "

wor.,.,, s''''s pnt T..
P.r Cent. a.. s''s'a kas..A.
Respon.,n,, q. S'sa = " ia,
'''aes*
I. What color il thar
The speaker was N N I !.
nc.an Of the V, II. MD !, WI !.
4 tall, gangle legged \ aila
80 .a s,.s, On which were ", ,';,s s's'
confusion several llun,i,..I s'e''
. aae,.a is, eolored wors,eds NJ Mo-
s I, shade and hue. fro,. '' ~
Maharln blue, from soIi H. " y
pu irI' gray. cherry ana III S,as.
Inc doctor continnesi. s ",
ms test ls to select IN ~, ~ "a
shades. Now. hi ID 81 ,' 'sH aRd
An aa.l lu me-, .ne doctor put ii Y
w y ualA SHADES running f,os
3 aa'A green y q little I'll I.
selves. f@s v
'nai' watched himciossI,
sase''s were al thrown baeg ~
apa ~ ne man began
!, ,,.',t III =. your hand run 81.
woas.eu' ou' let Your eye d N 4
sa'u rs doctor, as the man H. y
Il oser ti'e pile
Ms man put gray Ind ia,
M. p'oM ~, together. ~
..1 r,'a. = 40 said the doctor
a. g 'ii''l' ! not ~ til d 4.
','sniaii' brakeman, swilchm.s
uuelol' FL " TACT, any onev N, Z,
" Signals. He is color-bIind "
a.on z s'''llcient for any raiImaa 4
= navy
ms PECULIAR wRAKsFss
NOW to determine xl,.a N;
chronatlc defect Is We No. ~ i
skein.
4 ne is red blindhe wiIIuict 4. Il
q Vioiets' or both II he shuulli /.
oil'iu ne VIII select grags aid g,s, II
oiue greens. Sometimes. 10 MI.
I'VE previous tests, we tag o,, MI
skeih. and the party selects I,,o. X
greens IN their different shades
Y mai percentage do you 6pI Il
those examined, 70 be color bIindss
About per cent, ara c,jo, u
mat IS one out Of every twentv.s,s|
dividuals. There are more Nj NM
any other color
y is often asked why We Ann
anime the men By the lamps NJ!
OF the most difficult things ii NH
glass regularly When the W.
blown u cannot be made all Nh Y
Color Then, II the glass Ii thirkss
color VIII be darker. Again, sol,ets
the WICK Is turned higher and I'M
hight has a greater lunlintsity wbis1
other Is a very dull light There NJ,
dust or steam over the glass sud'
light will be darker, 4 dirty whae]
to one color blind would be taken i
green Hag, which means safety 4
would take a dirty dark green a,
which means danger. This would
to endless confusion.
| do you believe this to beasonga
defect!
| Yes, but 1t may also arise from
ease, injuries and the excessive ID
tobacco and alcohol In ore fana
know OF four who are color blind
brothers and two sisters. ID and
family an uncle and anpphew,f
do you examine for anything III
"Oh. yes. Il is Just as imToitaal
examine for vision and hearing as |
for color blindness. In order torste
test for vision this is the programme
test plate containing letters that cal
seen at 200 feet and twenty feet, III
| feet being the normal eye. is place
one end of the room
The room IS daFkened flle ~
placed twenty feet distant, and lls
requested to cover one eye wlile
other is being examined i bcses'
we call twenty twentletlis-thatk
letters representing twenty teei-Ae
normal vision. Beth eyes afe pul'e
test-iirst the right then Tue ~
has a vision in both eyes 2 y
fiftieths minus-that lsto say ! fFs rs
see at twenty feet what be ollslll =
at fifty-he is rejected, prosli'ed X
don't improve The vision i 3 laa V
see that big B, the large letter Wig
ought to see at 20o, at twenty lea =.
only one eye, then he has pracllea1'','
one eye, and there nave oeeli ~ ~
amined who never Knew ''la' 'N'
not see Out OIL ohis ohe ese
TESTING FOR HEARING
"How do you test to- hearing
with my watch Ing llla,' l 4 +
ed to cover up his eyes ana l's J,
watch to his ear, gradually rF'pv 4.
away until the exact o'aan's T.
can hear the ticking IS knoNiA !, +
No when he ceases to AeaF y !
two-thirds of all the ENGINEERS 81 Y !.
of hearing, or, better ueis,'i Y. i !,
right ear. which is due 70 'nfn + !.
out of the cab window col y ". X
| .4o,,t contact with the Wlllui 1i's