From the June 2, 1934, issue
By Science News
FIRST CHIMPANZEE TWINS PICTURED WITH MOTHER
The first chimpanzee twins born in captivity, and the first occurrence of such a double birth among the great apes for which there is any scientific record, was reported recently by Dr. Robert M. Yerkes of the Laboratories of Comparative Psychobiology, Yale University.
A camera was trained on the rare infants by M.I. Tomilin, of Dr. Yerkes’ staff, obtaining the very excellent portrait shown on the cover of this week’s Science News Letter.