Vol. XXI, No. 5 18 December, 1922 
THE 
NEW PHYTOLOGIST 
A BRITISH BOTANICAL JOURNAL 
EDITED BY 
A. G. TANSLEY, 
UNIVERSITY LECTURER IN 
CAMBRIDGE 
IN CONSULTATION WITH 
THE CAMBRIDGE 
CONTENTS 
PAGE 
Permeability continued . By Walter Stiles. Chapter X. The Influence 
of External Conditions on the Intake and Excretion of Water by Plant 
Cells and Tissues.233 
Physiological Studies in Plant Anatomy. V. Causal Factors in Cork 
Formation. By J. H. Priestley and Lettice M. Woffenden . . 252 
The Structure and Function of the Endodermis in the Leaves of the 
Abietinese. By Isabel Soar, Ph.D.269 
The Origin of the Hybrid Primula elatiorx vulgaris demonstrated experi¬ 
mentally in the Field, with Notes on other British Primula Hybrids. 
By Miller Christy, F.L.S.. 293 
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