Commentary on the First Three Books of Aristotle's Physics

have read everything correctly in the manuscripts, that I have omitted nothing, or that I have managed all things rightly. This one thing I know for certain: that if I have erred less frequently, it is due to the learning and kindness of Hermann Diels. For he never failed me when I asked, and often, as is the custom of friends, he brought most useful help of his own accord. Furthermore, in investigating the passages of Aristotle, I was sometimes assisted by the excellent colleague Felix Tocco, the most philological of our fellow philosophers. I therefore offer my greatest thanks to these most deserving friends, as well as to the most distinguished men in charge of the Laurentian, Marcian, Neapolitan, Vatican, and Parisian libraries, who either liberally sent manuscripts or arranged for them to be inspected with the greatest kindness.

Written at Florence, in the month of May, 1887.

H. VITELLI.