18 JULY 1891, Page 12

The Midnight Sky. By Edwin Dunkin, F.R.S. (Religions Tract Society.)—This

is such a useful and clear guide to the stars, with its thirty-two star-maps for different months in both hemi- spheres, and the easy chat which accompanies each, that we must notice an enlarged and revised edition. Much has happened in astronomy lately. The stars are no longer what they were, according to Mr. Lockyer, and though his hypothesis need not upset the pleasure of the midnight sky, yet people must be kept up to the advance. The Midnight Sky we should recommend to most people who have not already something similar, as the easiest means of identifying the stars they see.