19 FEBRUARY 1921, Page 24

The New Age Encyclopaedia. Vols. IX. and X. (Nelson. 3s.

6d. net each.)—This remarkably compact little encyclo- paedia is now complete. The last two volumes run from Riga to Tankpa, and from Tanks to Zymotie. The short article on Tanks is clear and good. Under Telegraphy the development of wireless is well described. Trotsky, the Bolshevik Terrorist, is duly noted. The book is admirably edited and is well illus- trated with photographs, maps, and diagrams.