The Philosophical Review/Volume 1/Summary: Schaefer - Beiträge zur vergleichenden Psychologie
Beiträge zur vergleichenden Psychologie. Von Karl L. Schaefer. I. Das Verhalten wirbelloser Tiere auf der Drehschue. Z. f. Ps. u. Phys. d. Sinn., III, pp. 185-192.
These experiments are in continuation of investigations on the perception of passive motion — more especially rotary motion — in which the reacters were vertebrates having semicircular canals. In this case invertebrates — snails, flies, beetles, ants, caterpillars, and ear-wigs — were placed on the rotary table and their reactions to rotary motion observed. S. found that the 'reacters' moved on a plane table against the motion of the table, though not in every case. The caterpillars did not move at all, the snails not always, and the beetles, ants, flies, and ear-wigs only when they were already in motion. Unlike the vertebrates, the invertebrates investigated showed no after effects of the rotary motion in the form of rotary giddiness.