De usu partium libri XVII ad codicum fidem recensuit Georgius Helmreich. 2 vols.

First separate edition, edited from the prior printed editions and the surviving early manuscripts, of Galen's treatise on the function, use and purpose of the individual parts of the body. In this treatise Galen explained the value of anatomical understanding of the human body in a way that was accessible to non-physicians. For the English translation see May (1968). Digital facsimile of the 1907-09 edition from the Internet Archive at this link.