ation of the goat-glands
into a human being after a lapse of years, when the first implant may be
expected to have worn itself thin, will result in the same improvement
in the physical and mental condition of either man or woman as took
place upon the first implant. This is, in fact, the basis of his theory
that the normal age of man and woman today can be surely extended from
the three score and ten limit to possibly twice that number of years.
You are invited to consider what this discovery of Dr. Brinkley's
operation, for it is no less than a discovery, would have meant to the
world in the prolongation of the lives of those benefactors in all
fields of human endeavor, Literature, Science, Art, etc., if it had been
known and understood when Shakespeare wrote, when Darwin worked, when
Rubens painted, and when Patti sang. It will please your fancy to
picture what might have been, but we have before us the consideration of
what is, and it is more than comforting to know that we shall deal here
with the hard cold facts of what is being done today, and will be done
tomorrow. This is no poet's dream, but the stern reality of a young
surgeon's work in hospital, extending over three memorable years of
achievement in a virgin field. Dr. Brinkley has worked out his problem
alone, save for the devoted aid of his wife, who is also a licensed
physician. He is today a poor man, and expects to remain so, because he
has refused every alluring offer made him looking to the establishment
of this Goat-Gland operation as a commercial proposition on a big scale.
He is governed by his ethical vows, and retains his independence, but
the world would call him a fool for not turning his discovery to his
greatest pecuniary profit. Since he prefers to remain true to his ideals
in this matter it is for us at least to be thankful, and accord him the
recognition to which the scientist is entitled who puts his work above
his profits.

Chicago, April, 1921.

CHAPTER I

DR. BRINKLEY'S THEORY

We are not privileged to be discursive in a little book which seeks to
hit the nail on the head in every paragraph, drive it home in every
page, and clinch it in every chapter, and there would be no excuse,
therefore, for sketching, even in brief outline, the history of the
various attempts that have been made, from Brown-Sequard, with his
Elixir, to Metchnikoff, with his benevolent bacteria of the intestinal
tract, to extract from Life its secret of