1 December, 1923 
Vol. XXII, No. 5 
THE 
NEW PHYTOLOGIST 
A BRITISH BOTANICAL JOURNAL 
EDITED BY 
A. G. TANS LEY, M.A., F.R.S. 
UNIVERSITY LECTURER IN BOTANY 
CAMBRIDGE 
IN CONSULTATION WITH THE 
THE CAMBRIDGE BOTANY 
CONTENTS 
PAGE 
On the Phenomena attending Seasonal Changes in the Organisation in Leaf 
Cells of Picea canadensis (Mill.) B.S.P. By Francis J. Lewis, D.Sc. and 
Gwynethe M. Tuttle, M.Sc. (i figure in text) . . . .225 
Primula vulgaris var. caulescens. By Miller Christy, F.L.S. . . . 233 
Permeability ( concluded ). By Walter Stiles. Chapter XIV (continued). 
Theories of Cell Permeability (continued). Chapter XV. Concluding 
Remarks.239 
Literature cited . . . . ..247 
The Supposed Reversal of Geotropic Response. By F. C. Newcombe . 281 
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