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AIRCRAFT YEAR BOOK, 1923

SOCRATES ON HUMAN FLIGHT On the day he drank the hemlock (B. C. 399) Socrates, in conversation with friends who called on him in prison, said:

we are dwelling in a hollow of the earth, and fancy that we are on the surface; and the air we call the heaven, and in this we imagine that the stars move. But this is also owing to our feebleness and sluggishness, which prevent our reaching the surface of the air; for if any man could arrive at the exterior limit, or take the wings of a bird and fly upward, like a fish who puts his head out and sees this world, he would see a world beyond; and, if the nature of man could sustain the sight, he would acknowledge that this was the place of the true heaven and the true light and the true stars."

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Four Miles a Minute—Curtiss-Army Racer.-Photo, J. A. Davis, N. Y. C.

AIRCRAFT
YEAR BOOK

TRANSPORTATION LIBRARY

1923

PUBLISHED BY
AERONAUTICAL CHAMBER OF COMMERCE

OF AMERICA, INC.

NEW YORK CITY

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