eck; nevertheless the one is sometimes fed, physicked, and
whipped by mistake for the other, and the description of these little
domestic catastrophes was usually given by the mother, in a phraseology,
that is sometimes touching by reason of its seriousness. I have one case
in which a doubt remains whether the children were not changed in their
bath, and the presumed A is not really B, and _vice versa_. In another
case, an artist was engaged on the portraits of twins who were between
three and four years of age; he had to lay aside his work for three
weeks, and, on resuming it, could not tell to which child the respective
likeness he had in hand belonged. The mistakes become less numerous on
the part of the mother during the boyhood and girlhood of the twins, but
are almost as frequent as before on the part of strangers. I have many
instances of tutors being unable to distinguish their twin pupils. Two
girls used regularly to impose on their music teacher when one of them
wanted a whole holiday; they had their lessons at separate hours, and
the one girl sacrificed herself to receive two lessons on the same day,
while the other one enjoyed herself from morning to evening. Here is a
brief and comprehensive account: 'Exactly alike in all, their
schoolmasters could never tell them apart; at dancing parties they
constantly changed partners without discovery; their close resemblance
is scarcely diminished by age."

[Illustration: FOUR BABY GIRLS AT ONCE

FIG. 1.--These quadruplet daughters were born to Mr. and Mrs.
F. M. Keys, Hollis, Okla., on July 4, 1915, and were seven months old
when the photograph was taken. Up to that time they had never had any
other nourishment than their mother's milk. Their weights at birth were
as follows (reading from left to right): Roberta, 4 pounds; Mona, 4-1/2
pounds; Mary, 4-1/4 pounds; Leota, 3-3/4 pounds. When photographed,
Roberta weighed 16 pounds and each of the others weighed 16-1/4. Their
aunt vouches for the fact that the care of the four is less trouble than
a single baby often makes. The mother has had no previous plural births,
although she has borne four children prior to these. Her own mother had
but two children, a son and a daughter, and there is no record of twins
on the mother's side. The father of the quadruplets is one of twelve
children, among whom is one pair of twins. It is known that twinning is
largely due to inheritance, and it would seem that the appearance of
thes