Berlin: Carl Heymann, 1861. Hardcover. Fifth revised edition of this work by prominent German professor of astronomy. Many tables and formulas throughout the German text. Bound in contemporary three quarter brown leather with marbled paper boards. Spine leather has partially split from the spine, leather is chipped and rubbed. Interior pages clean. Very good condition. 667 pages plus 16 pages on the planets. SCI/042815. Very Good.