xviii ' CONTENTS. 



PAGE 



Behaviour of Vegetable .Tissues towards Gases Part 1 85 



Influence of External Pressure on the Absorption of Water 



hy Roots „ 85 



Contrivances for the Erect Habit of Plants, and Influences 



of Transpiration on the Absolution of Water , 85 



Sap , „ 86 



Solid Pigments in the Cell-sap „ 86 



Movement of Sap in Plants in the Tropics „ 87 



Exudation from Flowers in Relation to Honey-dew , . . . ,, 87 



Latex of the Euphorbiacem „ 88 



Crystalloids in Trophoplasts and Chromoplasts of Angio- 



' sperms .. .. „ 89 



Eormation and Resorption of Cystoliths „ 90 



Functions of Organic Acids in Plants „ 90 



Formation of Ferments in the Cells of Higher Plants .. „ 91 



Poulsen's Botanical Micro-Chemistry „ 91 



living and Bead Protoplasm Part 2 250 



Aldehydic Nature of Protoplasm „ 250 



Embryo-sac and Endosperm of Daphne , .. „ 250 



Constitution of Albumin „ 251 



Fertilization of Sarracenia purpurea „ 251 



Sexual Relations in Monoecious and Dioecious Plants . . . . ,, 251 



Corpuscula of Gymnosperms „ 251 



Comparative Structure of the Aerial and Subterraneous 



Stem of Dicotyledons „ 252 



Function of Root and Stem in Dicotyledons and Mono- 

 cotyledons ,, 253 



Suber in of the Cork-oak ,, 254 



Influence of Pressure on the Growth and Structure of Bark „ 254 



Relation of Transpiration to Internal Processes of Growth „ 254 



Easily Oxidizable Constituents of Plants „ 255 



Action of Light on the Elimination of Oxygen „ 257 



Red Pigment of Flowering Plants „ . 257 



Coloured Roots and other Coloured Parts of Plants .. .. „ 259 



Starch in the Root „ 259 



Protcids as Reserve-Food Materials „ 260 



Leucoplastids „ 260 



Cleistogamous Flowers „ 260 



Cultivation of Plants in Decomposing Solutions of Organic 



Matter , „ 260 



Disease of the Weymouth Pine „ 260 



Flora of Spitzbergen „ 261 



Continuity of Protoplasm Part 3 404 



jj 5) > 405 



Living and Dead Protoplasm „ 406 



Occurrence of Protoplasm in Intercellular Spaces ., .. „ 406 



Division of the Cell-nucleus „ 407 



Apical Cell of Phanerogams „ 408 



Nettle-fibre „ 408 



Laticiferous Tissue of Manihot Glaziovii {Ceard Rubber) , . „ 409 



Laticiferous Tissue of Hevea spruceana „ 409 



