Theou megaloio hekēti, Ad theses hasce de locorum affectorum cognitione generali

faculty is imparted, in those cases it cannot happen that sense perishes while motion is preserved; but on the contrary, with motion harmed, sense can still be intact, as happens in the muscles.

XIX.

FROM THE FORM OF THOSE THINGS WHICH ARE EXCRETED, affected parts are recognized. First, dia tēs ousias tōn merōn through the substance of the parts. Then absolutely: as when, because of a piece of lung rejected expectorated lung tissue, we say the lungs are affected; and because of a membrane rejected, we say the larynx is affected by an ulcer.

XX.

Then by applying a distinction which is taken from the Position or the path through which they are excreted, Pain, Magnitude, Time, Mixing with other excrements, and similar things. Thus, indeed, a rejected membrane or caruncle small fleshy outgrowth signifies ulceration. But if it has been rejected through the urine, it indicates an affection in the urinary instruments; with the menses, in the uterus; through the stool, in the intestines; if thicker, in the lower intestines; if thinner, in the upper parts.

XXI.

Next, from the periechomenōn contained materials, whether kata physin according to nature or para physin contrary to nature. And here too, partly absolutely: as when we argue that the bladder is harmed if urine is rejected through a wound; the intestine if stool; the peritoneum if omentum; the chest if breath.

But if