I 
1 June, 1922 
Vol. XXI, No. 3 
THE 
NEW PHYTOLOGIST 
A BRITISH BOTANICAL JOURNAL 
EDITED BY 
A. G. TANSLEY, M.A., F.R.S. 
UNIVERSITY LECTURER IN BOTANY 
CAMBRIDGE 
IN CONSULTATION WITH THE STAFF OF 
THE CAMBRIDGE BOTANY SCHOOL 
CONTENTS 
PAGE 
Physiological Studies in Plant Anatomy. III. The structure of the Endo- 
dermis in relation to its function. By J. H. Priestley and Edith E. 
North . . ... . . .113 
Permeability continued. By Walter Stiles. Chapter VIII. The Plasma- 
Membrane ..140 
Laboratory Notes. The Projection Microscope. By H. J. Denham, M.A. 163 
Laboratory Notes. A Multiple Switch and Commutator for Thermo¬ 
couples. By H. J. Denham, M.A.. . .166 
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