TABLE OF CONTENTS ix 



PART EIGHT 



RADIOBIOLOGY 111 



Radioactive Carbon, G. Evelyn Hutchinson 112 



PART NINE 



SPACE BIOLOGY 117 



The Challenge of Space Biology, Wallace O. Fenn 118 



PART TEN 



LOWER PLANTS, DISEASES, AND MEDICINE 121 



Attempt at a Dissertation on the Diseases of Plants, 



Johann Christian Fabricius 122 



The Fight with the Fungi, James G. Horsfall 125 



The Role of Plant Pathology in the Scientific and Social 

 Development of the World, E. C. Stakman 132 



Male and Female Bread Moulds, as related by A. F. 



Blakeslee 139 



Vegetable Jewels at Work, Eugene W. Nelson 143 



Botany and Medicine, H. W. Youngken Jr. 146 



PART ELEVEN 



HORTICULTURE 153 



Horticulture is a Great Green Carpet that Covers the 



Earth, H. B. Tukey 154 



PART TWELVE 



FORESTRY 165 



Excerpts from "Enquiry into Plants," Theophrastus 166 



Plant Anatomy and its Relation to Forestry, J. W. Sexery 169 



