CONTENTS. 
PAGE 
Brown, W.— Studies in the Physiology of Parasitism. IX. The Effect on the Germina- 
tion 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 . . . . . 301 1 
Wormald, H. — Further Studies of the ‘ Brown Rot’ Fungi. I. A Shoot-Wilt and 
Canker of Plum Trees caused by Sclerotinia cinerea. With Plates XIII and XIV . 305 
Matthews, J. R.— The Distribution of Plants in Perthshire in Relation to ‘Age and 
Area’. With two Figures in the Text . . 321 
Arber, Agnes.— O n the Nature of the ‘Blade’ in certain Monocotyledonous Leaves. 
With twenty-nine Figures in the Text 329 
Singh, Kharak. — D evelopment of Root System of Wheat in Different Kinds of Soils 
and with Different Methods of Watering. With three Figures in the Text . . 353 
Knight, R. C. — Further Observations on the Transpiration, Stomata, Leaf Water-content, 
and Wilting of Plants. With three Figures in the Text 361 
Chandler, M. E. J.— Sequoia Couttsiae, Heer, at Hordle, Hants : A Study of the 
Characters which serve to distinguish Sequoia from Athrotaxis. With five Figures in 
the Text 385 
Salisbury, E. J. — The Soils of Blakeney Point : A Study of Soil Reaction and Succession 
in Relation to the Plant Covering. With Plate XV and five Figures in the Text . 391 
Brown, William. — O n the Preparation and Use of Collodion Osmometers . . . 433 
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