THE “History of Astronomy,” by Prof. Rudolf Wolf, of Zurich, a volume of 800 pages issued at a very moderate figure, is a contribution to the literature of the science of no ordinary value to the student. The production of such a work, involving an outline of the progress of astronomy from the earliest times to the present period, must have been a labour of great extent, requiring much research, notwithstanding the assistance that might be afforded by historical treatises previously in the hands of astronomers, and it is only due to Prof. Wolf to acknowledge the very able and complete manner in which he has accomplished the heavy task he had imposed upon himself some years since. Geschichte der Astronomie. Von Rudolf Wolf. (Munchen: R. Oldenbourg, 1877.)