that I did not find any examples among the
Indian girls.

The usual tests for color blindness are the matching of wools; the
common error the color blind falls into is matching a bright scarlet
with a green. On one occasion, a color blind gentleman found fault
with his wife for wearing, as he thought, a bright scarlet dress, when
in point of fact she was wearing a bright green. Another color blind
who was very fond of drawing, once painted a red tree in a landscape
without being aware that he had done so.

Among the whites it affects all classes. It is found as relatively
common among the intelligent as the illiterate, and unfortunately, up
to the present, we have not discovered any remedy for this defect.

Without quoting many instances where a color blind man was responsible
for accidents at sea, I must quote a case where an officer on the
watch issued an order to "port" his vessel, which, if his order had
been carried out, would have caused a collision, and a probable
serious loss of life.

The letter was written by Capt. Coburn, and is to be found in the
_Mercantile Marine Reporter_, vol. xiv.

"The steamer Neera was on a voyage from Liverpool to Alexandria. One
night, shortly after passing Gibraltar, at about 10.30 p.m., I went on
the bridge, which was then in charge of the third officer, a man of
about forty-five years of age, and who up to that time I had supposed
to be a trustworthy officer, and competent in every way. I walked up
and down the bridge until about 11 p.m., when the third officer and I
almost simultaneously saw a light at about two points on the starboard
bow. I at once saw it was a green light, and knew that no action was
called for. To my surprise, the third officer called out to the man at
the wheel, 'port,' which he was about to do, when I countermanded the
order, and told him to steady his helm, which he did, and we passed
the other steamer safely about half a mile apart. I at once asked the
third officer why he had ported his helm to a green light on the
starboard bow, but he insisted it was a red light which he had first
seen. I tried him repeatedly after this, and although he sometimes
gave a correct description of the color of the light, he was as often
incorrect, and it was evidently all guesswork. On my return, I applied
to have him removed from the ship, as he was, in my opinion, quite
unfit to have charge of the deck at night, and this application was
granted. After this occurren