REVIEWS. 
175 
The effect of direct sunlight — a subject on which Professor Ward has 
already added to knowledge — on tissue containing bacteria or the 
mycelium of fungi, the feeding of animals and insects on diseased 
tissues, the production of roots from tissues not previously root forming 
in cases of diseased roots, all have an important bearing on the plant 
in its pathological aspect. In fact, all agencies, organic or physical, 
which tend to restore the plant to the normal, are of the greatest 
interest, both from a biological standpoint and that of the therapeutist. 
At a time when attention is specially directed to the application of 
exact knowledge to all human activities, this book will do much to 
further this principle in a sphere the importance of which it is hard 
to undervalue. 
J. B. CARRUTHERS. 
Tropical Agricultural Journals. 
Journal d’ Agriculture Tropicale. Paris. Monthly. 20 francs per 
annum. 
Revue des Cultures Coloniales, Paris. Fortnightly. 20 francs per 
annum. 
Bulletin du Jardin Colonial, Paris. Bi-monthly. 20 francs pej’ 
annum. 
Der Tropenpflanzer, Berlin. Monthly. 10 marks per annum. 
Mededeelingen uit’s Lands Plantentuin. Buitenzorg, J ava. Appear- 
ing at irregular intervals and prices. 
Bulletin Economique de ITndo-Chine, Saigon. Monthly. 
With the exception of Holland, the nations of Continental Europe 
have hitherto been backward in developing tropical agricultural colonies. 
This, however, is no longer the case, and the energetic efforts that are 
now being put forth by France, Germany, and other nations to found 
prosperous tropical colonies, and which are already meeting with a large 
measure of success, deserve the careful attention of all interested in the 
agriculture or the politics of this Island. Not merely are these foreign 
colonies commencing to compete with Ceylon in the continental markets, 
but other countries, favoured with richer soils or better climates, yet 
under the English flag, are rapidly coming into prominence as producers 
of what have hitherto been, or might be, Ceylon staples. This is not 
the place in which to enter upon a discussion of this topic ; all that is 
here intended is to call attention to some of the chief journals in which 
may be found much that is of interest to the Ceylon planter, but whose 
