CONTENTS 
No. CXLI, January, 1922. PAGE 
Fritsch, F. E.— The Moisture Relations of Terrestrial Algae. I. Some General Observations 
and Experiments. With two Figures in the Text i 
Jackson, Violet G. — Anatomical Structure of the Roots of Barley. With twelve Figures in 
the Text 21 
Osborn, T. G. B. — Some Observations on Isoetes Drummondii, A. Br. With fifteen Figures 
in the Text .............. 41 
Sharples, A., and Lambourne, J. — Observations in Malaya on Bud-rot of Coco-nuts. With 
„ Plates I-VII 55 
McLean, R. C. — On the Fossil Genus Sporocarpon. With Plates VIII-X . . . • 7 1 
W illiamson, Helen Stuart. — S ome Experiments on the Action of W ood on Photographic 
Plates. With Plate XI 9 1 
Brown, William. — S tudies in the Physiology of Parasitism. VIII. On the Exosmosis of 
Nutrient Substances from the Host Tissue into the Infection Drop. With one Figure 
in the Text 101 
Prescott, James Arthur. — T he Flowering Curve of the Egyptian Cotton-plant. With three 
Tables and seven Figures in the Text 121 
NOTE. 
Turrill, W. B. — Abnormal Flowers in Eranthis. With twelve Figures in the Text . . 131 
No. CXLII, April, 1922. 
Saunders, Edith R. — The Leaf-skin Theory of the Stem : A Consideration of certain 
Anatomico-physiological Relations in the Spermophyte Shoot. With thirty-four 
Figures in the Text 135 
Redfern, Gladys M. — On the Absorption of Ions by the Roots of Living Plants. I. The 
Absorption of the Ions of Calcium Chloride by Pea and Maize . . . .167 
Ikeno, S. — On Hybridization of some Species of Salix. II 175 
Ridler, W. F. F. — The Fungus present in Pellia epiphylla, (L.) Corda. With eight Figures 
in the Text 193 , 
Bews, J. W. — The South-east African Flora : Its Origin, Migrations, and Evolutionary 
Tendencies .............. 209 
Priestley, J. H., and Evershed, A. F. C. H. — Growth Studies. I. A Quantitative Study 
of the Growth of Roots. With five Tables and six Figures in the Text . . . 225 
Priestley, J. H., and Pearsall, W. H. — Growth Studies. II. An Interpretation of some 
Growth-curves. With four Figures in the Text ....... 239 
Arber, Agnes. — S tudies on Intrafascicular Cambium in Monocotyledons. V. With eight 
Figures in the Text 251 
Brown, William. — O n the Germination and Growth of Fungi at various Temperatures and in 
various Concentrations of Oxygen and of Carbon Dioxide. With four Figures in the 
Text ............... 257 
No. CXLIII, July, 1922. 
Brown, W. — Studies in the Physiology of Parasitism. IX. The Effect on the Germination of 
Fungal Spores of Volatile Substances arising from Plant Tissues . . . 285 
Smith, Edith Philip. — A Note on Conjugation in Zygnema. With Plate XII and two 
Figures in the Text 
30 
