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Manihot aipi, affected with a fungus disease. The natives informed 
him that it was not rare especially appealing after dry weather, but 
owing to the long spell of dry weather we recently had it had 
become rather aggressive. Research showed the fungus also in 
Tapioca growing in damp ground in the Botanic Gardens. The 
leaves show at first discolored spots on both surfaces, which are of 
various sizes, rounded or oblong £ to \ inch across, usually when 
well developed the central portion is dry surrounded by an irregular 
yellow patch of discoloration. The Whole patch eventually becomes 
quite dry and falls out leaving an irregular hole. Before it does so 
however, and when it has become brown,*' the fungus produces its 
fruits in the form of small black dots visible with an ordinary lens, 
chiefly on the upperside of the leaf. These small elevations produce 
a number of sausage shaped spores. 
The fungus appears to be one of the Uredincos . 
At present it does not appear to have done much harm although 
abundant in some spots. Mr. SNODGRASS reports that the plants in 
affected fields produce large and good roots, but it is by no means 
to be neglected. The leaves affected turn yellow and fall and the 
plants have a sickly appearance. It is advisable to destroy as many 
sick leaves as possible by burning them, and to spray the plants 
with Bordeaux mixture. 
BIBLIOGRAPHY. 
RUBBER CULTIVATION IN THE BRITISH EMPIRE, 
By Herbert Wright, Associate r.c.s., f.l.s. 
Mr. Wpigiit is so well known to the public interested in 
Rubber through his work “Hevea braslhensis or Para Rubber, 
its Botany, cultivation, Chemistry and diseases published last 
year that any further contributions from him on the same sub- 
ject is bound to be read with the greatest interest. The lecture 
delivered before the Society of Arts by Mr. WRIGHT and of which 
the book under notice is the lecture amplified, is an admirable 
summary of our present knowledge on rubber. The criticisms on 
the lecture by Dr. Prain, and others, on the various aspects of the 
rubber questions are no less interesting, than valuable. Altogether 
we heartily commend the book and recommend any one interested 
in the subject to obtain it without delay. It is published by 
MACLAREN and SONS, at the Office of the India Rubber Journal, 
37 and 38, Shoe Lane, E. C. 
