The Wheat Problem, By Sir William Crookes. (Longmaus and Co.
3s. 6d. net.)—Sir William Crookes has maimed his remarkable address to the British Association in 1898 for this third edition, which will assuredly attract more attention than the filet, now that we are actually faced with the possibility of a lack of bread. Ms contention was and is that the breatheating populations are growing faster than the wheat crepe, and that the chemist must be en- couraged to produce cheap fertilizers by extracting nitrogen from the air, as is now done in Scandinavia and Germany. Sir Henry Mew, in a supplementary chapter, discusses our future wheat supplies, and holds that at most we may hope to produce at home half the wheat we need if we restore to eultivation the four million acres on which wheat was grown in 1869,and if we inerease the average yield by skilled farming. Lord Rhondda, at whose instance the book is republished, contributes a signitionnt prefuee.
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