X CONTENTS 



CHAPTER VI 



22. Wiegmann's experiments l6o 



23. The work of Carl Friedrich von Gartner 164 



24. Wichura and the hybridization of willows 178 

 25". Kegel on hybridization 183 



26. Carl von Nageli and the hybrid question 183 



27. Treatise of W. O. Focke 204 



28. The Hoffmann Mendel citations 216 



CHAPTER VII 



29. Darwin's contribution to the theory of hybrids 221 



CHAPTER vin 



30. Sir Francis Galton's investigations in heredity 241 



CHAPTER IX 



31. Miscellaneous investigations on the histological 



structure of hybrids : 260 



a. Henslow 260 



h. Macfarlane 262 



c. Wilson 275 



d. Darbishire 276 



32. Spillman, Mendelian results with wheat, prior to 1900 276 



CHAPTER X 



33. The investigation of Gregor Mendel 286 



CHAPTER XI 



34. The discovery of Mendel's papers : 320 



a. Hugo De Vries 324 



h. C. Correns 335 



c. E. von Tschermak 343 



CHAPTER XII 



33". The contribution of William Bateson 359 



Index 367 



