6. New opponents of Sexuality and their refutation by Experiments, 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 17th century to about 1860 535 INDEX 565 ERRATA. Page 18, line 3 from bottom, _for_ Chini _read_ Ghini " 20, " 7, _for_ Schmiedel _read_ Schmidel " 160, " 2 from bottom, _for_ many _read_ some " 160, note, _for_ Robert _read_ Louis Marie Aubert " 201, line 11, _for_ asexually _read_ sexually. FIRST BOOK HISTORY OF MORPHOLOGY AND CLASSIFICATION (1530-1860) INTRODUCTION.