. All the
experiments have been made by myself, without any other person's
intervention; consequently, I do declare that I consider as real and
certainly perfect the method of Professor Thury.'

A perfectly trustworthy observer communicates by the _Medical and
Surgical Reporter_ of Philadelphia for May 2, 1868, the results of
similar experiments on animals, with like conclusions.

The plan of M. Thury was also tried on the farms of the late Emperor of
the French, with, it is asserted, the most unvarying success.

What is the result of the application of this law to the human race? Dr.
F. J. W. Packman, of Wimborne, has stated in the _Lancet_, that, 'in the
human female, conception in the first half of the time between menstrual
periods produces female offspring, and male in the latter. When a female
has gone beyond the time she calculated upon, it will generally turn out
to be a boy.'

In the Philadelphia _Medical and Surgical Reporter_ for February 8,
1868, a respectable physician writes that, in numerous instances that
have come under his observation, Professor Thury's theory has proved
correct, 'Whenever intercourse has taken place in from two to six days
after the cessation of the menses, girls have been produced; and
whenever intercourse has taken place in from nine to twelve days after
the cessation of the menses, boys have been produced. In every case I
have ascertained not only the date at which the mother placed
conception, but also the time when the menses ceased, the date of the
first and subsequent intercourse for a month or more after the
cessation of the menses,' etc.

Again, a physician writes to the same journal for June 20, 1868,
recording the result of his own experience.

A farmer in Louisiana states, in the _Turf, Field, and Farm_, in support
of this law, that 'I have already been able in many cases to guess with
certainty the sex of a future infant. More than thirty times, among my
friends, I have predicted the sex of a child before its birth, and the
event proved nearly every time that I was right.'

The wife, therefore, who would wish, as Macbeth desired of his, to

'Bring forth men-children only,'

should avoid exposing herself to conception during the early part of the
time between her menstrual periods.

The prediction of the sex of the child before birth can now be with some
accuracy made by the intelligent and skilful physician. The method of
doing so will be mentioned in trea