Contents. xv 



'AGE 



5. Further Development of the Sexual Theory by J. G. Koel- 



reuter and Konrad Sprengel, 1 761-1793 .... 406 



6. New opponents of Sexuality and their refutation by Ex- 



periments, 1 785-1 849 422 



7. Microscopic Investigation into the Processes of Fertilisation 



in the Phanerogams, the Pollen-Tube and Eggs, 1 830-1 850 431 



8. Discovery of Sexuality in the Cryptogams, 1 837-1860 . 436 



CHAPTER II. 



History of the Theory of Nutrition of Plants, 1 58 3- 1 860 . . 445 



1. Cesalpino, 1583 45° 



2. First Inductive Experiments and Opening of New Points of 



View in the History of the Theory of the Nutrition of 

 Plants, to 1730 • -453 



3. Fruitless Attempts to Explain the Movement of the Sap in 



Plants, 1 730-1 780 4 82 



4. The Modern Theory of Nutrition Founded by Ingen-Houss 



and Theodore de Saussure, 1 779-1 804 . . . • 49 1 



5. Vital Force. Respiration and Heat of Plants. Endosmose, 



1804-1840 5°4 



6. Settlement of the Question of Food-Material of Plants, 



1840-1860 5 2 4 



CHAPTER III. 



History of Phytodynamics 



From end of 1 7th century to about i860 535 



Index 5 6 5 



