925. In general, all those who explore souls and spirits, and therein have their cupidities and place their pleasures, pertain to the provinces of the secretory organs. Wherefore there are as many genera of them as there are viscera in man, there being no viscus whatever which does not have a secretory function, each in its own way. Consequently there are innumerable genera and species thereof, and their abundance is immense, for all glands, of which these are two kinds, are of this nature. 1748, Feb. 22.