XVI 



CONTENTS. 



Page 



Ascent and Circulation of the Sap No. 2 147 



Growth of the Root of Phanerogams .. „ 149 



Chlorophyll ,> 161 



Development of the Embryonal Sac No. 3 305 



Protein-crystalloids „ 306 



Composition of Chlorophyll „ 306 



Natural Science Prizes of the Brussels Academy . . . . No. 4 397 



Chemical Composition and Function of Leaves „ 442 



Fermentation in the Tissues of Plants „ 442 



Assimilation of Soda by Plants „ 443 



Nutrition of Phanerogamic Parasites „ 444 



Polyembryony, true and false, and its relation to Partheno- 



genesis 



444 



Permeability of Pellicle Precipitates No. 5 592 



Origin of Chlorophyll-grains „ 592 



Heliotropism of Plants „ 593 



Symbiosis jj 594 



Is the Ovule an Axial or a Foliar Structure ? , 594 



Starch-tramforming Ferments ,. 595 



Tannin in Vegetable Cells „ 595 



Functions of Vessels „ 596 



Natural Science Prizes, Danish Academy No. 6 699 



Division of the Pollen-grain in Angiosperms „ 746 



Anatomical and Physiological Study of Nectaries .. .. „ 748 



Causes of the Change in Form of Etiolated Plants .. .. „ 749 

 Effects of Submersion on Aerial Leaves, and of Water on 



Floating Leaves „ 750 



Absorption of Water by the Lamina of Leaves ,, 750 



Movements of Growing Leaves and Petals „ 751 



Disengagement of Heat which accompanies the Expansion 



of the Hale Inflorescence of Dioon edule „ 752 



Spiral Cells in the Root of Nuphar advenum „ 752 



Structure of the Fruit of Coninm macidatum „ 752 



Modifications which Starch undergoes from a Physical Point 



of View „ 752 



Rain of Sap „ 753 



Development of the Embryo of Phanerogams No. 7 902 



Development of the Embryo-sac of Angiosperms .. .. ,, 903 



Angiosperms and Gymnosperms „ 905 



Nucleus of the Embryo-sac „ 907 



Gymnospermy of Conifers „ 907 



Reproductive Organs of Cycadece „ 908 



True Mode of Fecundation of Zostera marina „ 908 



Arrangement and Growth of Cells „ 908 



Vari(ms Forms of the Cell-nucleus „ 909 



Condmting Tissue for the passage of Pollen-tubes .. ., „ 910 



Seminal Integuments of Gymnosperms „ 911 



Relationship of Intercellidar Spaces to Vessels .. .. „ 912 

 Peculiarities in the Power of Living Parts of Plants to 



conduct Electricity ,, 912 



Influence of Electricity on Vegetation „ 912 



