IN A PREVIOUS communication,1 the respiration of the ciliary processes was investigated, and it was found that a certain similarity exists between the metabolism of the ciliary processes and that of typical secretory glands, such as salivary glands. This was especially true in regard to the so-called "stimulation metabolism," i. e., the respiratory activity following stimulation of the excised surviving tissue slice with certain parasympathetic drugs, such as acetylcholine and physostigmine. Therefore, it was thought of interest to examine also the glycolytic activity of the ciliary processes, since it is known * that the "stimulation metabolism" affects also the glycolysis of the typical secretory glands. As a preliminary to this study it was necessary to investigate the various factors that influence the glycolytic activity of the ciliary processes. There are only a few scattered reports in the literature concerning glycolysis of the ciliary processes. The most recent one is that