BOOK REVIEWS. 



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gested are usually those commonly used," and are reliable so far as our 

 knowledge at present goes, they may be depended upon. The red 

 mites so common on apple trees are, in spite of the statement to the 

 contrary (p. 61), looked upon by most competent observers as quite 

 harmless, and, indeed, rather to be encouraged than destroyed. It is 

 interesting to learn that the ISTarcissus fly may be trapped " in spring 

 by placing saucers containing syrup or molasses among the plants " — 

 it is very important to note that this pest is about in May, June, and 

 well into July, and is, indeed, often abundant at the beginning of the 

 last month. We shall hope to see many little points such as these 

 rectified in a future edition. ' 



"The Coming of Evolution." By Prof. J. W. Judd, F.E.S. 

 8vo., 171 pp. (University rPress, Cambridge,. 1910.) Is. net. 



This little volume is the first of a new series issued under the title 

 " The Cambridge Manuals of Science and Literature." Its title amply 

 indicates the subject, and its treatment could have been in no better 

 hands.. The story of the groping for the truth concerning the origin 

 of species and the story of the recognition of evolution as a living 

 force are told in a most instructive and interesting manner, and the 

 reader is left in no doubt as to the great place Darwin must occupy 

 in the world of thinkers. This little book is a, noteworthy addition to 

 the long list of books dealing with evolution. 



" Battersea Park as a Centre for Nature Study." By Walter 

 Johnson, F.G.S. Sm. 8vo., 128 pp. (Eisher Unwin, London, 1910.) 

 Is. net (paper covers). 



Those w^ho say there is no wild life to study in a town should get 

 this little book. A brief history of Battersea and its park is given, but 

 the bulk of the book deals with the naturah history of the district, and 

 notes on the more conspicuous of the animals and plants add to the 

 interest of the lists which it contains. - 



. Diseases pf. Economic Plants. ", By F. L. Stevens, Ph.D., and 

 J, G. Hall, M.A. 8vo., x + :513 pp. (Macmillan Company, New 

 York, 1910.) 8s. 6d. net. . ■ , 



Though written for American growers, "English gardeners will find 

 this welL-illustrated and clearly-written book of great use. Following 

 instractiofis as to the making of fungicides, general notes on symptoms 

 of disease and oh methods of treatment, the mdst prevalent diseases 

 of special plants are dealt with. One innovation we notice, viz. an 

 attempt to coin distinctive popular namefei for various "diseases, but it 

 seems doubtful whether this essay is likely to be largely followed. 



Anthracnose " has " caught on " in some quarters for a certain type 

 of disease, but we doubt whether such terms as " septoriose," *' cer- 

 cosporose," " pseudomonose, " " colletotrichose, " and others akin will 

 find favour among growers. : , Who knows but what the gloeosporiose 

 of the I'ose will not sopn have:tQ be called the glomerellose of the rose, 

 if this type of nomenclature be adopted? and who is, the better for 



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