Note 7 — Chapter XXX · LOOKING BACKWARD.—THE LIVING BRAIN.
Reading edition
This experiment is not claimed as original. See Purkinje's Beiträge zur Kenntniss des Sehens in subjectiver Hinsicht (Prague, 1823 and 1825), whose conclusions to the effect that the shadow of the retina is seen, I-Am-The-Man ignores.—J. U. L.