Telegram-herald. ([Grand Rapids, Mich.) 18??-1892, 1891-05-27

. faltly OF I'VE, tlrce so1s anu
two daughters. the three SODA inherit
color blindness through their father
and grandfather, while the two daagh-
tiers. and indeed the whole Of the fe-
males of this family, are free from color
defect"
The question may De fairly asked;
Does color blindness increase with IN
ereaslng age2 There are some physical
defects which can be outgrown and
lost forever; but Mr.. Jabez Hogg says
of this very thing:
"A few carefully recorded cases lead
me To think that age does aggravate the
defect of color blindness. rs II does GER
tain other defects Of vision II I'M
doubleday becomes more pronounced
as the near point of vision rceedes- In
the case of Mr. ID. b. c., who ~ the
early age of fourteen went To sea. and
who, five or six years afterward, con-
suited me before he applied for his GER
ti1icate as third mate, pronounced him
red-color blind; nevertheless, sfterward
he obtained his certificate; and subse-
quently those of second and first mate
applied for his masters certificate. he
was unable TO pass the color test AT
this date l once more tested him tor
color. and on referring back to my
notes of an earlier date, came To the
conclusion that his color-blindness had
sensibly increased
Another was as follows: Capt.
F. consulted me for disturbed
state of vision - tobacco amaurosis-
His color sense was also very i'm
perfect. but as he soon recovered l saw
no more of him for nine or ten years,
when he one morning called upon me,
complaining of defective sight and Al
inability to distinguish the ships light.
He was then very uncertain about his
greens; dark-greens he called black and
dark-reds were simply warmer color.
than green's. In short, he was color
blind. Soon afterward no retired from
the service.
1.-THE next case is more strikingly
'corroborative. II. j, a lad age6
sixteen. myopic before going to sea
was examined at an ophthSlmic hospi
tai and pronounced free from color
blindness. On his return home, hi
passed the color-test examination and
obtained his certificate. Four years
afterward his father brought him t;
me. He was then complaining of hi.
inability to distinguish the color of ths
ships signal lights, and he often missed
the ropes. This he attributed to hi,
short sight He was unable to selec
or sort the skeins of colored wool; II
short, he was completely color-blind
recommended him not to go up for hi
second examination. His friends
thought otherwise. He was rejected
and his certificate was Endorsed color
blind This, of course, put stop t.
his further career in the service. Tn
father of this patient was not color
blind; but he was unable to So.
whether his father or grandfather ha'
suffered from any defect of vision. Tn
myopia must have been transmitted"
The statistics we have just presente,
to our readers plainly prove that thu
utmost caution must be exercised b,
parents, railway officials and marine in
spectors before they allow their chill
dren or their candidates to enter upol
line of occupation for which by ma
ture they are wholly untitled. And tn
| public itself ought to lay to heart tn
many facts revealed by Mr.. Jabe
| Hogg. A large percentage of the pull
lie is every day travelling either by Sc
or rail. and it is absolutely necessar
that the utmost precaution should b
exercised in ascertaining the compe
tency of the men in charge for readin,
aright the colored signs and signal
which in their various and silent way
predict safety, caution or danger.-N
| Y. Ledger.