2 NOVEMBER 1907, Page 41

The Wild and Cultivated Cotton Plants of the World, by

Sir George Watt (Lengman.s and Co., 30s. net), is the work of an expert which we must be content with acknowledging. "The present publication," we read in Sir George Watt's preface, "incorporates the field studies of perhaps twenty years, linked up with the results of a careful re-examination of the collections preserved in some of the chief herbaria of the world." No less than fifty-one varieties are pictured. When one thinks of how other plants have been improved by knowledge and experiment, Sir George Watt's labours acquire a new interest.