WORKS ON 



TROPICAL AGRICULTURE 



THE COTTON PLANT IN EGYPT: Studies in 



Physiology and Genetics. By W. LAWRENCE BALLS, 

 M.A. Illustrated. 8vo. 53. net. 



This book records the results of a series of researches made upon 

 cotton plants in Egypt. It is intended primarily for economic 

 botanists, but the requirements of economists, cotton spinners, and 

 irrigation engineers have also been considered. While the subject 

 has been studied almost entirely at Cairo, the author believes that 

 the interest of his book is not alone Egyptian. 



SPICES. By HENRY N. RIDLEY, C.M.G., F.R.S. 

 Illustrated. 8vo. 8s. 6d. net. 



Mr. Ridley's book is a practical work intended for the use of 

 planters in all parts of the world. In it the reader will learn about 

 the soils suited for the various spices, the diseases from which the 

 plants suffer, the most efficacious insecticides and fungicides, the 

 different kinds of manure to be used, and indeed everything con- 

 nected with this branch of agriculture. 



COCOA. By Dr. C. J. J. VAN HALL, Chief of the 

 Botanical Laboratories, Buitenzorg, Java. Illustrated. 

 8vo. [Autumn, 1913. 



SYLVICULTURE IN THE TROPICS. By A. 



F. BROUN. Illustrated. 8vo. 8s. 6d. net. 



The author of this book was formerly a member of the Indian 

 Forest Service, and then successively Conservator of Forests, Ceylon, 

 and Director of Woods and Forests, Sudan Government, so that he 

 discusses his subject with the authority of an expert who has, over 

 a long period, been in personal touch with the problems of forest 

 maintenance and cultivation. 



MACMILLAN AND CO., LTD., LONDON. 



