the doctor's office attest this. Here, for instance,
is a letter from a man eighty-one years of age, who says, "I feel like a
boy of eighteen. This is something I have not known for more than forty
years. The goat-glands have certainly done the work for me, but I wish,
doctor, you would fix it so that I could complete the sexual act," etc.,
etc.

But this completion of the sexual act is exactly the thing that is to be
avoided in the case of these old men. Remember the theory in the last
chapter, "All animal energy is sex-energy." The conversion of this
sex-energy into other forms of energy, physical and mental, is the aim,
and this aim would be frustrated if these old men were given full power
to do as they pleased with their new-found youthful vigor. You cannot
always trust them. That is the purpose of the ligating of both sides,
making the emission of the semen impossible. The life-force, then,
having no other outlet, can do nothing else but reinvigorate the entire
system by pouring its precious fluids into the blood.

Suppose, now, the case is that of a man of fifty who is physically run
down, married, and anxious to be the father of a child. In such a case,
if the man is physically sound, Dr. Brinkley will do one of two things.
After the transplantation of the new glands he will either ligate one
side permanently, and allow one testis to carry on the work of
rejuvenation while the other can be used for procreation, or he will
ligate both sides and say to the man, "I am tying off both testes
because you will need to rebuild for at least one year before you should
think of becoming a father. But I am ligating with linen thread, which
does not dissolve, and if you come back to me in one year from now I
will remove the ligatures, one or both, and you will then be able to
procreate." This is reasonable and wise talk, and the man makes no
objection. When the year of probation, as you might call it, has
expired, the man returns to the hospital, the ligature is removed, and
he goes home in a couple of days. These things are not fairy-tales, but
solid facts, amazing as they sound to you. There are five goat-gland
babies today among Dr. Brinkley's patients that he knows of, four boys
and one girl. There are probably many more of whom he has heard nothing,
for patients have a way of moving out of touch after awhile.

CHAPTER III

THE PRACTICE. WOMEN

At Dr. Brinkley's hospital, a beautifully appointed private resi