TILLERS 

 OF THE GROUND 



BY 



MARION I. NEWBIGIN, D.Sc. 



CONTENTS 



Chapter i. Primitive Tillers of the Ground. 2. Reclaiming the 

 Desert. 3. Some Contrasts. 4. The Beginnings of Agriculture. 5. 

 The Spreading of Food-Plants. 6. The Spreading of Food-Plants 

 (continued). 7. Overcoming Difficulties The Date and the Fig. 8. 

 Introducing Dates into North America; 9. The Story, of the Smyrna 

 Fig. 10. Food and Food-Plants, n. The Chief Kinds of Food-Plants. 

 12. Improving Cultivated Plants. 13. Experiments in Plant-Breeding. 

 14. Making New Plants. 15, The Struggle with Disease. 16. The 

 Story of Rust in Wheat. 17. Plant Food and the Utilisation of the 

 Soil. 18. The Gains that Knowledge has brought. 



THREADS IN 

 THE WEB OF LIFE 



BY 



PROFESSOR J. ARTHUR THOMSON, M.A. 



AND 



MARGARET R. THOMSON 



CONTENTS 



Chapter i. Man as Hunter. 2. Domesticated Animals. 3. Domes- 

 ticated Animals (continued). 4. Earthworms and their Work. 5. Man's 

 Struggle with Animals The Flesh-eating Animals. 6. Animals which 

 destroy Man's Crops. 7. The Balance of Nature. 8. Pasteur and his 

 Work. 9. Mosquitoes and Malaria. 10. Inter-Relations among 

 Animals, n. Aids in the Struggle for Existence. 12. Social Life 

 among Animals. 13. Social Insects. 14. Inter-Relations among 

 Plants. 



LONDON : MACMILLAN AND CO., LTD. 

 A 



