Theses de pestilentia

XXIII.
Diet, whether in drinks or foods, can cast the human race into the same evil.

XXIV.
From this, therefore, it is clear that if we look to the form of pestilential diseases, as many differences of the plague can arise as there can be common diseases, which are at the same time lethal.

XXV.
Looking, however, to more remote causes, one arises from air corrupted in its whole substance, another from the same air altered in its primary qualities, and a third from diet. I reduce the other common causes to the same.

XXVI.
If we weigh the internal cause, one has more analogy to this or that subject, and likewise, one putrefaction is more harmful and grave than another.

XXVII.
Signs are either general or special. General ones either signify a future plague or show a present one. Many signs of a future one are commonly brought forth, to be weighed by the certain judgment of a student of medical philosophy, since the greatest part of them is polluted with superstition. To explain the signs of a present pestilence would be to transfer here the symptoms of many