""A Manual of Spherical and Practical Astronomy V2: Theory and Use of Astronomical Instruments"" is a comprehensive guide to the principles and applications of astronomy, written by William Chauvenet and originally published in 1891. This second volume focuses on the theory and use of astronomical instruments, covering topics such as the telescope, the transit instrument, the zenith sector, and the sextant. Chauvenet provides detailed explanations of how these instruments work and how they are used in astronomical observations, as well as discussing the mathematical principles behind their design and operation. The book also includes numerous diagrams, illustrations, and tables to aid in understanding the concepts presented. This volume is an essential resource for anyone interested in the history and practice of astronomy, and is a valuable reference for students and professionals in the field.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.