6 JUNE 1868, Page 24

Half-flows with the Telescope. By Richard A. Proctor. (Hardwicke.) —Mr.

Proctor has not found a very good title for his book. It suggests the idea of talk about the wonders of astronomy, a topic, by the way, which we have no wish to depreciate, but does not describe the writer's real object, which is of a more practical kind. He seeks to help amateur " telescopists," informs thorn how the instrument is made, how they are to proceed in observing, and what they may and may not expect to see. It seems a very useful manual.