ASTRONOMY. H. N. Russell, R. S. Dugan, J. Q. Stewart.
(Ginn. 2 vols. 10s. 6d. each.)-This is a revision of Young's Manual of. Astronomy, and hails from Princeton University Observatory. It is flier, however, than the now out-of-date Manual. The authors do not employ the calculus, and an elementary student could master a great deal of the contents here so admirably arranged. The illustrations are profuse and beautiful. There is a great deal of disputable matter in these Volunles, especially Chapter xxvi., which deals with star evolution and may, at any time, have to be scrapped. But the book, just because it is not mere mathematics minus imagination, is in a class of its own.