“The influence of subcutaneous injections and of instillations of adrenalin upon the pupils of frogs,” with demonstrations

Abstract

Many observers have established the fact that subcutaneous injections as well as instillations of adrenalin exert no influence upon the width of the pupil in normal mammals. In a series of experiments published recently by the authors of this report it was shown that from 24 hours to 48 hours after the removal of the superior cervical ganglion, a subcutaneous injection or an instillation of adrenalin caused considerable dilation of the pupil, which lasted an hour or longer.