Atlanta Georgian. [volume] (Atlanta, Ga.) 1912-1939, 1914-04-12
SECRET Of SEX
CONTROL FOUND,
SAVANT CLAIMS
Scientist Tells Results of Re-
markabIe Experiments Made
Upon Animals.

NEW YORK, April 1l.-Remark-
able achievements in the control Of
sex OF animals in experiments at the
Carnegie Laboratory at Cold Spring
Harbor, L. J., were described last
night by DR. oscar Riddle Of the Cold
Spring Harbor experimental station.
DR. Riddle lectured under the auspices
Of the Feminist Forum OF Columbia
University in Earl Hall. The most
important part Of his own expert
ments as described by him had to do
with sex control OF pigeons and doves.
Professor James Harvey Robinson,
Of the history department of Column
bia, as chairman OF the meeting, an
nounced that 1t was called to discuss
the natural changing Of woman to
meet changed conditions Of environ
ment. and the question whether wom-
an was biologically so different from
man that manlike ideals were mac
cessible to her because Of her very
nature, DR.. Riddle, however pre-
ferred to speak about pigeons and
doves, cows and sheep. He did not
mention woman suffrage.
Experiments With Bees.
our knowledge of the essential
nature Of the laws OF sex has in
creased by leaps and bounds through
biological Investigations" he said,
We find that human beings are not
masculine to the absolute exclusion Of
the feminine, nor feminine to the eX-
elusion Of the masculine. We find
that the male is female plus some
thing more"
The egg OF a honey bee, If left
alone, he said, produced a male drone,
# fortified, II produced a female bee;
IL fed on royal food a queen bee.
DR. Riddle told Of frog eggs al
lowed to oyermature and then ferti-
1lzed with male sperm, and said they
produced males; while similar eggs,
fortified without allowing them to
overmature. produced 50 per cent fe-
males BY drawing off water from
otals' eggs, he added Sc to 90 per cent
females had been produced where
otherwise the males predominated.
Results Show in Cows.
Similar good cases Of sex control
had been achieved, he said, in the
case Of cattle A cows egg mot in
the lay Leghorn or Plymouth Rock
sense Of the term) fertilized early
after IL was loosed, was found likely
to produce a female, while in the same
egg were fertihzed only twelve hours
after II was loosed, II was likely to
produce a male Sheep eggs fertil-
ICED in October we're found to pro-
duce a great predominance of females,
while in November the predominance
was male,
Describing experiments Of Profess
sor Whitman and himself with pig
cons. he said
1--WE found II we mated dove or
pigeon with a consort of very dis
family related species, We would get
only males: II with consort Of a
species not so distantly related, males
at first, both males and females In
the middle Of the season, and nearly
all females at the end Of the season.
At the extreme end OF the season,
however, the eggs, while female
would not hatch, and some would not
even develop into an embryo at all.
ii was then that Professor Whitman
concluded that the male was female
plus something
coloring Tested.
Tn the second year the same birds
produced fewer males and more fe-
males. Later, when the birds were
older and not at the height OF their
reproductive power they would pro
duce females Where there were two
eggs from one clutch, we usually
found the second egg larger. the in
crease being associated with an in
creased tendency to produce females
and the amount Of energy increased
in female eggs The water content OF
the first eggs at the beginning OF the
season was much higher than at the
end Of the season, the higher water
content going with the male pro-
ducing egg
we found dark color ana male sex
in pigeons that came az the beginning
of the laying season and white color
and female sex at the end Of the sea
son Mating a Japanese ring dove
with a white bird, we found where
the white bird was male that all
the the sons would be dark IN color
and every daughter would be white
The father could not give any son his
color and must give it to every
daughter II, on the other hand, the
white bird was a female, all the prog
eny was dark The white mother
could not give any or her children her
color"