THE JOURNAL OF ECOLOGY 
EDITED FOR THE 
BRITISH ECOLOGICAL SOCIETY 
BY 
A. G. TANSLEY 
T HE objects of The Journal of Ecology are (i) to foster and promote in all 
ways the study of Ecology in the British Isles, serving as the organ of the 
British Ecological Society ; (2) to present a record of and commentary upon 
the progress of Ecology throughout the world. Its contents include original articles 
and notes on ecological topics of current importance, including methods of ecological 
study and research ; reviews and notices of publications of general ecological bearing 
and of work upon plant and animal communities in all parts of the world ; reports 
and notices of meetings of the British Ecological Society ; and the progress of the 
Nature Protection movement and of ecological work in Nature Reserves. 
The Journal of Ecology , being largely a Review, is indispensable to those 
desiring to keep abreast of the extensive and widely scattered literature of Ecology, 
of which it will take a comprehensive view, including in its scope not only work 
dealing with general principles, methods, surveys, and other ecological studies, but 
also publications dealing with Plant and Animal Ecology and Geography, Plankton- 
ology, the science of soils (soil physics, chemistry, and the investigation of soil 
floras and faunas), and other branches of Natural Science (Geology, Climatology, 
Agriculture, Forestry, &c ), so far as these have a direct bearing upon Ecology — •/ 
the relationships of plants to their environment in the widest sense, including the 
inter-relationships between plants and animals. In brief, it aims at furnishing 
a comprehensive review of progress in the entire field of Ecology, touching, as this 
field does, kindred branches of science on various sides. 
The Journal of Ecology is published quarterly — in March, June, September, and 
December. The annual subscription price, including postage to any part of the world, 
for a single copy of each of the four issues making up the annual volume, is Fifteen 
Shillings (15s.) net ; single copies, Five Shillings (55.) net each. Subscriptions for 
the Journal are payable in advance and should be sent to. Mr. C. F. Clay, Cambridge \ 
University Press, Fetter Lane, London, E.C., either direct or through any bookseller. 
Members of the British Ecological Society should send their annual subscription 
to the Society, One Guinea {£1 is.), which includes the supply of one copy of 
each of the four issues of the Journal, to the Secretary, Dr. E. J. Salisbury, Limbrick 
Hall, Harpenden. All Editorial communications should be addressed to Mr. Tansley 
at the Botany School, Cambridge. 
Contents of Vol. IV, Nos . j and j. December 1916 
THE EMERGENCE OF THE AERIAL ORGANS IN WOODLAND PLANTS. 
By E. J. Salisbury. (With 7 text-figures.) 
AN ACCOUNT OF THE CHIEF TYPES OF VEGETATION IN SOUTH 
AFRICA, WITH NOTES ON THE PLANT SUCCESSION. By J. W. 
Bews. (With 1 text-figure.) 
OSMOTIC PRESSURE IN ROOTS AND IN LEAVES IN RELATION TO 
HABITAT MOISTURE. By V. Iljin, P. Nazarova, and M. Ostrovskaja. 
ON THE VEGETATION OF FOUR DURHAM COAL-MEASURE FELLS. 
I. GENERAL DESCRIPTION OF THE AREA AND ITS VEGETATION. 
By Harold Jeffreys. (With Plate XI and 3 text-figures.) 
NOTICE OF PUBLICATION ON FOREIGN VEGETATION:— 
Plant Succession in the Mount Robson Region, British Columbia (Cooper). 
REVIEW. THE DEVELOPMENT OF VEGETATION:— 
Plant Succession, an analysis of the development of vegetation (Clements). 
