Observations and Experiments on the Physiology of the Senses. Contributions to the Knowledge of Vision in its Subjective Aspect

A translation of Purkinje’s first book on subjective visual phenomena is given in this chapter. As indicated on the title pages opposite, the book was published first in 1819 and then reprinted with a slightly longer title in 1823 and this version was included in the first volume of his Opera Omnia published in 1918, and in the Opera Selecta of 1948. The translation here is based on the reprinted editions of the book. All the figures were originally printed on a single plate at the end of the book (see Fig. 3.2) but they are presented here at the locations corresponding to the text describing them with the figure number for this chapter in [square] brackets following the original figure numbers.