XVI CONTENTS. 



PAOB 



Sieve-Tubes Part 3 370 



Structure and Functions of Stomata „ 372 



Stomata of Stapelia „ 372 



Influences of External Forces on the Direction of Growth . . „ 372 



Water Distribution in Plants „ 373 



Causes of the Movement of Water in Plants , 373 



'■^Compass-flowers" „ 373 



Chemical Difference between Dead and Living Protoplasm. 



(Fig. 90) Part4 522 



Killing of Protoplasm by Various Reagents „ 522 



Apical Cell-growth in Phanerogams „ 523 



Development of Bordered Pits „ 523 



Development of Tissue as a Characteristic of Groups of Plants „ 524 



Stomata of Polycolymna Stuarti „ 524 



Properties and Mode of Formation of Duramen „ 525 



.History of Assimilation and of the Functions of Chlorophyll „ 525 



Theoretical View of the Process of Assimilation .. . . „ 525 



First Products of Assimilation „ 526 



Absorption of Metallic Oxides by Plants , 526 



Decomposition of Calcium carbonate in the Stem of Dicoty- 

 ledonous Woods „ 527 



Hypochlorin „ 528 



Latex of Euphorbia Lathyris „ 529 



Darwin's so-called " Brain function " of the Tips of Boots . , „ 529 



Aerial Cultivation of Aquatic Plants „ 530 



Insectivorous Plants , 531 



Climbing Plants „ 531 



Power of Movement in Plants „ 531 



Electrical Researches on Plant Forms „ 532 



Electromotive Properties of the Leaf of Dionoca „ 533 



Influ£nce of a Galvanic Current on Growing Roots .. .. „ 533 



Plant-crystals. (Plate VI.) Part 5 597 



Development of the Embryo and Embryo-sac „ 643 



Embryogeny of the Leguminosce „ 644 



Development of the Ovule of Primula „ 647 



Homology of the Ovule „ 648 



Phytoblasts and their Pseudopodia „ 649 



Formation of Pollen-tubes „ 649 



Cause of the Movement of Pollen-tubes „ 650 



Apical Growth of the Roots of Phanerogams „ 650 



Pitchers of Dischidia Rafflesiana „ 651 



Influence of Light and Air on the Anatomical Structure of 



Plants „ 651 



Respiration of Plants , 651 



Oxalate of Lime in Plants „ 653 



Insects and the Cross-fertilization of Flowers „ 653 



Structure and Movement of Protoplasm Part 6 804 



Protoplasm of Compound Laticiferous Tubes „ *805 



Development of the Embryo-sac , 805 



Development of the Embryo in Lupinus „ 807 



