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Again and again, men have led round the circles the Materialized Spirits of their wives, and introduced them to each visitor in turn; fathers have taken round their daughters, and I have seen widows sob in the arms of their dead husbands. Testimony, such as this, staggers me. Have I been smitten with color-blindness?

But no representative Virginian shares that prophetic vision; the color-blindness, on whichever side it is, has not yielded to treatment during the twenty-five years that have elapsed since the close of the war, and may as well be accepted for an indefinite period.

Thus the Good ranges all the way from the good to eat to the good to sacrifice one's self for; the Beautiful ascends from the most trifling prettiness to the height of the spiritually sublime; while the True takes in all manner of verities, great and small. In comparing notes with my Philosopher I am chagrined at my own color-blindness.

"I'll tell you one thing, though," I added. "The writer of the note knew nothing of Rogers's color-blindness you're off the scent there." "I am?" he asked amazedly. "Then how did you know it, Mr. Lester?" "I suppose you detectives would call it deduction I deduced it." He took a contemplative puff or two, as he looked at me. "Well," he exclaimed, at last, "I must say that beats me! Deduced it!

Arguing with a peculiar mental idiosyncracy resembling color-blindness, common among the French of the time, these savans came to the conclusion that "therefore there never was any flood at all."

Similar defects may exist in a boy's attention or memory, judgment or feeling, thought or imagination, suggestibility or emotion, and they may remain just as undiscovered as the defect of color-blindness, which is characteristic of four per cent of the male population. All such deficiencies may be dangerous in particular callings.

They mention a well-known disease, tobacco blindness, usually beginning with color-blindness, and progressing occasionally with increasing dimness of vision to entire loss of sight. The Sense of Hearing. The structure of the human ear is much more complicated than is generally supposed. It is an apparatus constructed to respond to the waves of sound.

They may tell you much that is chiefly imaginary, but even imagination has got to have some physical basis as a starting-point. They may tell you much that is clearly and ludicrously irrelevant, or untrue, on account of inaccuracy of observation, confusion of cause and effect, or a mental color-blindness produced by the disease itself.

The Belgian government instituted an investigation into the cause of the prevalence of color-blindness. The unanimous verdict of the experts making the examination was that the use of tobacco was one of the principal causes of this defect of vision. "The dimness of sight caused by alcohol or tobacco has long been clinically recognized, although not until recently accurately understood.

Experiment 155. Gently turn the inner part of your lower eyelid down. Look in a mirror, and the small lacrymal point, or opening into the nasal duct, may be observed. Color-blindness. There is an abnormal condition of vision called color-blindness, in which the power of discrimination between different colors is impaired.