The most complete medieval treatise on urinoscopy. Actuarius was first to use a graduated glass for its examination. Joannes Zacharias Actuarius was the last of the great Byzantine physicians. Actuarius or actarius (Greek: ἀκτουάριος), was a title applied to officials of varying functions in the late Roman and Byzantine empires. By 12th century, or perhaps in the 11th century, the term came to be applied to prominent physicians, possibly those attached to the imperial court. By the 16th century the title Actuarius was conflated as Joannes's last name. This is the first complete Latin translation. An abridged edition appeared in 1519. Partial English translation in No. 2241.

The 5th and 6th books of Actuarius's De methodo medendi, concerning materia medica. Digital facsimile from the Internet Archive at this link.

First edition in latin, translated by Mathisius of Bruges from a manuscript of the Greek text that probably originated in the library of the Emperor Andronicus II Palaiologos or that of the ex-Patriarch Joseph. Digital facsimile from Google Books at this link.

Includes texts of the following authors:  Abitianus, Actuarius, Johannes, Alexander, of Aphrodisias, Andromachus (Senior), Apollonius, Dyscolus, 2nd cent, Archelaus (philosophus), Cassius (Iatrosophistes), Hermes, Trismegistus, Hierophilus (Sophistes), Hierotheus, Marcellus Sidetes, Maximus Planudae, Mercurius, Cyrus, Palladius Alexandrinus, Psellus, Michael, Soranus, of Ephesus, Sotion, Stephanus (Alexandrinus), Symeon Magister, Theophrastus, Theophylactus Simocatta, Xenocrates Aphrodisiensis. Digital facsimile from the Internet Archive at this link.