t must have an effect on the
race. We expect the sons of a line of soldiers to inherit their fathers'
courage--perhaps his habit of obedience--but not his wooden leg."

To establish his views he selected from a fine family of guinea-pigs two
pair; set the one, Pair A, in conditions of ordinary guinea-pig bliss,
and subjected the other, Pair B, to a course of discipline. They were
trained to run. They, and their descendants after them, pair following
on pair; first with slow-turning wheels as in squirrel cages, the wheel
inexorably going, machine-driven, and the luckless little gluttons
having to move on, for gradually increasing periods of time, at
gradually increasing speeds. Pair A and their progeny were sheltered
and fed, but the rod was spared; Pair B were as the guests at
"Muldoon's"--they had to exercise. With scientific patience and
ingenuity, he devised mechanical surroundings which made them jump
increasing spaces, which made them run always a little faster and a
little farther; and he kept a record as carefully as if these little
sheds were racing stables for a king.

Several centuries of guinea-pig time went by; generation after
generation of healthy guinea-pigs passed under his modifying hands;
and after some five years he had in one small yard a fine group of the
descendants of his gall-fed pair, and in another the offspring of
the trained ones; nimble, swift, as different from the first as the
razor-backed pig of the forest from the fatted porkers in the sty.
He set them to race--the young untrained specimens of these distant
cousins--and the hare ran away from the tortoise completely.

Great zoologists and biologists came to see him, studied, fingered,
poked, and examined the records; argued and disbelieved--and saw them
run.

"It is natural selection," they said. "It profited them to run."

"Not at all," said he. "They were fed and cared for alike, with no gain
from running."

"It was artificial selection," they said. "You picked out the speediest
for your training."

"Not at all," said he. "I took always any healthy pair from the trained
parents and from the untrained ones--quite late in life, you understand,
as guinea-pigs go."

Anyhow, there were the pigs; and he took little specialized piglets
scarce weaned, and pitted them against piglets of the untrained lot--and
they outran them in a race for "Mama." Wherefore Mr. Ross Warden found
himself famous of a sudden; and all over the scientific