CONTENTS. 



PREFACE. 



SPONTANEOUS GENERATION 9 



VITALITY OF SEEDS 14 



DOES WHEAT TURN TO CHESS? 38 



PLANTING IN THE MOON- 51 



Do VARIETIES RUN OUT? 66 



VAN MONS ? THEORY 72 



BUDS AND SEEDS 76 



SEEDLESS FRUITS 79 



ERRORS ABOUT GRAFTING 81 



ERRORS ABOUT CROSSING 85 



MISTAKES IN PRUNING 88 



EXOGENS AND ENDOGENS 93 



ERRORS CONCERNING THE PITH 95 



ERRORS ABOUT ROOTS 97 



SPONGIOLES 102 



CIRCULATION OF THE SAP 104 



ELONGATION OF TREE TRUNKS, ETC 110 



FEEDING SQUASHES MILK 114 



THE HUMUS THEORY 117 



LIEBIG'S MINERAL THEORY 118 



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