Lastly, 6th, Attention to prominent symptoms.

The stores of the Arabian pharmacy, which he brought into action to meet all these indications, were indeed very considerable; it is to be observed, however, that, for the most part, gentle means were accumulated, which, in case of abuse, would do no harm: for the character of the Arabian system of medicine, whose principles were everywhere followed at this time, was mildness and caution.

On this account, too, we cannot believe that a very prolix treatise by Marsigli di Santa Sofia, a contemporary relative of Galeazzo, on the prevention and treatment of plague, can have caused much harm, although perhaps, even in the fourteenth century, an agreeable latitude and confident assertions respecting things which no mortal has investigated, or which it is quite a matter of indifference to distinguish, were considered as proofs of a valuable practical talent.
The agreement of contemporary and later writers shows that the published views of the most celebrated physicians of the fourteenth century were those generally adopted.

Among these, Chalin de Vinario is the most experienced.

Though devoted to astrology still more than his distinguished contemporary, he acknowledges the great power of terrestrial influences, and expresses himself very sensibly on the indisputable doctrine of contagion, endeavouring thereby to apologise for many surgeons and physicians of his time who neglected their duty.