Helen glanced mischievously at me, as a half-repressed snort interrupted his dissertation.

The woman in the fur cap, who might have been a teacher improving odd hours, had knocked up the barrel of her microscope; she gazed through the window at the dazzling Hudson. Next her a thin, sallow girl, whose dark complexion contrasted almost weirdly with her yellow hair, slashed at a cake of paraffine, her deep-set eyes emitting a spark at every fall of the razor. The other student, a young woman with the heavy figure of middle age, went steadily on, dropping paraffine shavings into some fluid in a watch crystal. With a long-handled pin she fished out minute somethings left by the dissolving substance, dropping these upon other crystals--some holding coloured fluids--and finally upon glass slides. She worked as if for dear life, but every quiver of her back told that she was listening.

"You agree vit' me?"

"It seems reasonable; the subject is one that you have deeply studied."

"Ach so! T'e perfect organism must haf t'e perfect beauty. T'e vorld has nefer seen a perfectly beautiful man or voman. Vat vould it say to von, t'ink you? But perfection, you vill tell me, is far to seek," he went on, without waiting for a reply. "Yet people haf learned t'at many diseases are crimes. By-and-by, we may teach t'em t'at bat organism is t'e vorst of crimes; beautiful organism t'e first duty. V'at do you say?"

The fur-capped girl pushed back her chair.

"Prof. Darmstetter," she said, "will you be good enough to look at my sections?"

"He's stirred up the hornets' nest," whispered Helen. "But come; perhaps they will show us. Those girls are so clever; they're sure to have something interesting."