ordinary observation that men are taller, heavier, stronger and more
active than women, and this holds true in all stages of civilization,
wherever tests have been made. In strength, rapidity of movement, and
rate of fatigue Miss Thompson's studies[2] show that men have a very
decided advantage over women. Thus in strength tests, the men in Yale
have double the power of women in Oberlin;[3] while our college athletic
records place men far ahead of women in all events requiring strength
and endurance.

[2] HELEN B. THOMPSON, _Psychological Norms in Men and Women_, p. 167.
University of Chicago Press, 1903.

[3] THOMAS, _Sex and Society_, p. 21. University of Chicago Press, 1907.

The differences in structure between men and women are such as to
correspond with the functional differences just stated. A woman's bones
are smaller in proportion to her size, than are those of a man. The body
is longer, the hips broader, and the abdomen more prominent. Relatively
to the length of the body, the arms, legs, feet and hands are shorter
than in men, the lower leg and arm are shorter in proportion to the
upper leg and arm. Man has the long levers and the active frame. One has
only to look at two good statues of a man and a woman to realize the
greater strength and activity of the man.

Woman, as she actually appears in modern society, is also less subject
to variation than man;[4] she is much less liable to be a genius or an
idiot than her brother.[5] She offers greater resistance to disease,
endures pain and want more stoically, and lives longer; so that while
more boys than girls are born in all parts of the world, where
statistics are kept, in mature years women always outnumber men.