Yerkes

Mr. Yerkes, an American millionaire, generously undertook to provide the cost of this observatory.

Mr. Yerkes, of Chicago, was a speculator who made millions in the street-car system.

But this freak is a very educable creature, as Professor Yerkes has shown.

Three rooms of the laboratory are reserved for psychological experiments on animals, under the special charge of Dr. Yerkes.

It has now two—the Paris 50-inch refractor and the Yerkes 5-foot reflector.