REVIEWS AND NOTICES OF BOOKS. 6^ 



difference in appearance and position between young and old 

 leaves, between upright shoots, e.g. in the thorn tree, and 

 arrested twigs, the question whether the whole of the blade of a 

 leaf lies in one plane, as in the case of the alder, or in more than 

 one, as in the case of the elm, are discussed and illustrated in 

 the most delightful fashion, and those who have watched trees 

 through the changing seasons have the pleasing experience of 

 finding here their half-unconscious observations formulated and 

 illustrated. Such a sentence as — "The holly leaf attracts 

 attention by its many diverse planes, with the consequent power 

 of reflecting different lights on the same leaf," for example, calls 

 up at once pictures of the bushes as seen on a winter's day with 

 their innumerable tiny mirrors gleaming in the pale sunlight, 

 while some of the drawings of twigs in first leaf contain the very 

 essence of the spring. 



There is a useful classified bibliography, botanical and general 

 works being distinguished. We recommend the book to the 

 notice of all lovers of trees. 



Insects and Man. An account of the more important, harmful, 

 and beneficial insects, their habits and life-histories, being 

 an introduction to Economic Entomology for students and 

 general readers. Illustrated with drawings and reproduc- 

 tions from photographs. By C. A. Ealand, M.A. Price 

 I2S. London: Grant Richards, Ltd., 1915. 



In the Introduction, which gives a general statement regarding 

 the importance of insects from the economic standpoint, the 

 author disclaims the credit due to research workers in 

 Entomology, and modestly describes his book as " an attempt to 

 compile in non-technical language a concise summary of the 

 varied relations of insects and man." The result, representing 

 much reading and much searching of the literature, is a very 

 readable and serviceable book. At a time when, more than ever, 

 insects are pressing themselves on man's notice in conveying 

 disease and in destruction of his stock and his crops, this book 

 should secure readers. The insect world is so vast, and the 

 relationship between insects and man so complex, that Mr 

 Ealand has had to choose outstanding examples in his various 

 chapters, and the selection has been well made. 



Of insects that have proved extremely harmful to plants 



