126 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



this Supplement incorporates all the additions rendered necessary by 

 the advance of scientific investigation and the author's corrections 

 of the first edition. The reading of the book will perhaps be a Uttle 

 awkward, as the Supplement will need to be consulted for every page 

 read, and it would probably have been more convenient (except as 

 regards cost) to have printed the whole work again with the additions 

 and corrections incorporated in their proper places. Albeit, no 

 serious student of plant physiology can afford to be without this 

 valuable book, especially valuable as it expresses not only the opinions 

 of the author but those of other investigators, and gives numerous 

 references to the voluminous literature of the subjects dealt with. 



Professor Gibson has in no sense " edited " the book, but has given a 

 clear translation of Dr. Jost's work, adhering as closely to the language 

 of the original as the change from German into English permitted. 



" Wild Flowers." By MacGregor Skene, B.Sc. Sm. 8vo., 92 pp. 

 (Jack, London, 1914.) Cloth, 6d. net. 



The " People's Books " form a remarkable series of little volumes, 

 apparently designed to take all knowledge for their province, all the 

 English-speaking people into their intimacy. They are well written, 

 deal with an extraordinarily wide range of subjects, illustrated, in some 

 cases profusely, and so cheap as to bring them within reach of the 

 poorest seeker after self-education. The present volume. No. 117 

 of the series, contains 209 woodcut illustrations, descriptions of two 

 hundred of the commonest wild flowers arranged according to the 

 prevailing colour of their flowers and according to the form of their 

 leaves, with information as to flowering time and habitat, and will 

 prove a most useful guide to a beginner seeking the name of a common 

 wild plant. 



" A Course of Practical Work in the Chemistry of the Garden." 

 By D. R. Edvvardes-Ker. 8vo., 40 pp. (Murray, London, 1914.) 

 IS. 6d. net. 



This little book presents a series of practical exercises designed to 

 help the horticultural student to understand a little of the science 

 underlying practice in manuring and the making and use of sprays. 

 It is the only book of the kind with this special purpose with which 

 we are acquainted, and we feel sure it will be useful in horticultural 

 classes. The exercises represent an absolute minimum, however, of 

 the work necessary for such students to do, and without a basis of 

 chemical knowledge they will be unintelligible to many. 



" The Story of Plant Life in the British Isles." By A. R. Horwood. 

 8vo., xiv + 254 pp. (Churchill, London, 1914.) 6s. 6d. net. 



The intention of this book is to describe examples of all the 

 common British families of flowering plants in simple terms, and to 

 give notes upon the types chosen. Seventy-three photographs illus- 



