This volume comprises a textbook for engineering schools and a manual of field methods. The purpose of this book is to provide a text in practical astronomy especially adapted to the needs of civil-engineering students. The text deals chiefly with the classes of observation which can be made with surveying instruments, the methods applicable to astronomical and geodetic instruments being treated but briefly. The chapters contained herein include: The Celestial Sphere - Real and Apparent Motions; Definitions - Points and Circles of Reference; Systems of Coordinate on the Sphere; Relation between Coordinates; Measurement of Time; The American Ephemeris and Nautical Almanac, et cetera. This book was first published in 1925, and is being republished now complete with a specially commissioned new introduction.