Excerpt from An Introductory Course in Experimental Psychology, Vol. 1 of 2: A Text-Book and Laboratory-Manual for the Use of Colleges and for Private Study The second peculiarity of every Visual sensation is that it continues, after its stimulus (namely light) has been actually withdrawn, and under favorable conditions it outlasts considerably the application of the latter. It is the purpose of the following two experiments to ascertain this persistence Of Visual sensations and to measure it. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.