Contents. xv 



PAGE 



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



renter and Konrad Sprengel, 1761-1793 .... 406 



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



periments, 1785-1849 422 



7. Microscopic Investigation into the Processes of Fertilisation 



in the Phanerogams, the Pollen-Tube and Eggs, 1830-1850 431 



8. Discovery of Sexuality in the Cryptogams, 1837-1860 . 436 



CHAPTER II. 

 History of the Theory of Nutrition of Plants, 1583-1860 . . 445 



1. Cesalpino, 1583 450 



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, 1730-1780 482 



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



and Theodore de Saussure, 1779-1804 . . . .491 



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



1804-1840 504 



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



1840-1860 524 



CHAPTER III. 



History of Phytodynamics 



From end of 1 7th century to about 1860 535 



INDEX 565 



