Contents. xv 







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



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



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



periments, 1785-1849 . . . . . . . 4->j 



7. Microscopic Investigation into the Processes of Fertilisation 



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

 S. Discover}- of Sexuality in the Cryptogams, 1837-1860 . 436 



CHAPTER IT. 



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 .... ... 4^2 



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 5 -'4 



CHAPTER III. 



History of Phytodynamics 



From end of 1 7th century to about 1860 .... 535 



INDEX 565 



