450 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
BOOK REVIEWS. 
"The Chemistry of the Garden." By H. H. Cousins, M.A., 
F.C.S. (Macmillan, London, 1916.) is. 
Eighteen years ago the first edition of this little work gratified 
the desires of many a gardener who wished for light on how to use 
" artificial " manures, and it has been reprinted many times since. 
Now it has been revised and a good many paragraphs added which in- 
crease the value of this little book, which should be at every gardener's 
hand. The additions are scattered all through the book, but are most 
numerous in the part devoted to fungicides and insecticides. We wish, 
however, a recipe had been given for making Burgundy mixture — it 
is a very effective substitute for Bordeaux mixture, and washing soda 
is, as a rule, more easily procurable than quick lime. 
" Gardeners' and Florists' Annual for 1916." Edited by J. H. 
Dick. (De la Mare Ptg. Co., New York.) 50 cents. 
The many friends of Mr. J. H. Dick on this side of the Atlantic 
will welcome this sign of his activities. The Annual contains a great 
amount of information gathered from both American and European 
sources all bearing upon horticulture, and especially upon the business 
aspects of horticulture. The volume for 1917, which is just received, 
is an even more valuable compilation. 
" British Fern Gazette." 
We have received a copy of this quarterly journal, which is edited 
by Mr. Chas. T. Druery, F.L.S., V.M.H., the recognized authority on 
British Ferns and their varieties, for the benefit of the members of the 
British Pteridological Society, of which he is the Hon. Secretary, 11 
Shaw Road, Acton, W. The subscription is only 5s. per annum, 
which entitles to membership of the Society and four issues of the 
Gazette. 
" Plants in Health and Disease." By F. E. Weiss, A. D. Imms, 
and W. Robinson. 8vo. viii + I 43 PP- (Longmans, London, 1916.) 
is. 6d. net. 
" Fungoid and Insect Pests of the Farm." By F. R. Petherbridge. 
8vo. vii X 174 pp. (University Press, Cambridge, 1916.) 4s. net. 
The first of these two books is based upon a course of lectures 
delivered at the University of Manchester last winter. It gives a brief 
but clear exposition of the functions of a plant growing healthily, 
and passes to a consideration of various troubles produced by fungus 
