119 - Mathematics - Surveying - Penther, Johann Friedrich. *Praxis Geometriae*, in which not only all cases encountered in field surveying ... are clearly explained. Second edition (supplement to the first edition). 2 parts in 1 volume. With an engraved allegorical frontispiece, 1 engraved header vignette, 1 engraved title vignette, and 38 (instead of 39) folded copper plates. Augsburg, Wolff, 1738–1739. 5 leaves, 97 pp., 2 leaves, 55 pp. 32.5 x 22 cm. Contemporary leather binding with spine label and gilt lettering (lower corner of the front cover has a small loss, slightly rubbed and scuffed).

Mathematics - Surveying - Penther, Johann Friedrich. *Praxis Geometriae*, in which not only all cases encountered in field surveying ... are clearly explained. Second edition (supplement to the first edition). 2 parts in 1 volume. With an engraved allegorical frontispiece, 1 engraved header vignette, 1 engraved title vignette, and 38 (instead of 39) folded copper plates. Augsburg, Wolff, 1738–1739. 5 leaves, 97 pp., 2 leaves, 55 pp. 32.5 x 22 cm. Contemporary leather binding with spine label and gilt lettering (lower corner of the front cover has a small loss, slightly rubbed and scuffed). Re I: Libri rari 215—see Ornament Engraving Catalog, Berlin 1734—Poggendorff II, 400. - First published in 1732, Penther’s (1693–1749) book remained a reference work for surveyors, cartographers, and architects until the end of the 18th century. - The plates depict measuring and drafting instruments as well as numerous examples of their use. - The missing plate is bound in as a copy. - Slightly browned and with foxing; the first 6 leaves show signs of moisture along the bottom margin. *