Tractate on the urine from the Hortus Sanitatis. Full "Tractatus de Urinis" from the rare and important "Hortus sanitatis", one of the most beautiful woodcutting books and "the most important natural history of the Middle Ages" (Choulant). Printed in Strasbourg by Johann Pruss, 1507. This is the third and last edition of this important treatise on the urinoscopy. With 2 leaf-sized woodcuts; These with representations of scholars at the hospital bed as well as in a pharmacy. Two-column gothic type with 55 lines. Ornamental initials initials with red ink. Numerous printed and hand-painted initial initials in red. Continuously rubriert in red. Leaf size: 29 x 20 cm. 28 nn. Sheet incl. Title. Complete tract. Without cover, on the back broschiert. In good condition. Paper evenly browned, in the margins brownish or slightly finger-stained. In the upper leaf margin as well as in the bow isolated little water-spotted. Title with deposited outline. A leaf with a small brown spot, thus minimal letter loss. Strong pressure and firm handmade paper.