11 JUNE 1921, Page 24

Discovery, the excellent " popular journal of knowledge " edited

by Dr. A. S. Russell (Murray, ls. net monthly), has in its June number an article on " Colour Photography " by Dr. R. A. Houstoun, who explains with unusual lucidity the principles involved; an account of the strange rock-dwellings in Cappadocia by Professor W. R. Halliday, and the first part of an exposition by Mr. A. R. Burns of Professor Irving Fisher's • Domesday Book. Ex Edgar Lee Masters. London: Eveleigh Nash. [20s. net.]

proposed new remedy for the inconveniences of rising and falling prices. It is good to see that this scholarly and attractive monthly has achieved the success which it deserves.