26 JUNE 1926, Page 24

PROCTOR'S HALF-HOURS WITH THE TELESCOPE. Revised by W. H. Steavenson.

(Longmans. 5s. net.)

THE popularity and usefulness of this well-known little book arc proved by the fact that it has passed through fourteen impressions since its appearance in mid-Victorian days. Dr. Steavenson has brought the text up to date, particularly in matters regarding binary stars and modern instruments, and the illustrations are entirely new.