CONTENTS 



PART I 



THE MEANING OF DOMESTICATED RACES AND THE 

 MANNER OF THEIR IMPROVEMENT 



CHAPTER PAGE 



I. The Dependence of Man upon Domesticated Animals 



and Plants 3 



Animals and plants as sources of food — As sources of cloth- 

 ing — As sources of shelter — Vegetable products as sources 

 of heat and light — Dependence of man upon animal labor — 

 Animals a means of recreation — Animals and plants as sources 

 of raw material for manufacturing purposes — Medicinal prop- 

 erties of animals and plants — The business of farming 



II. Domesticated Races originated in the Wild ... 11 



Domesticated races Vary — Creation not yet finished — Most 

 domesticated races have close relatives in the wild — Domesti- 

 cated species existed first in the wild — Species change in domes- 

 tication — Improvement sometimes slight — Domestication a 

 gradual process — How the history of domestication is known 



— Not always able to identify the original — Distinction between 

 feral and wild 



III. How Animals and Plants came to be Domesticated 20 



Domestication the result of necessity — Need for help in the 

 hunt — Need for additional food — Need for clothing and shel- 

 ter — Need for labor — Domestication the first step in civiliza- 

 tion — The civilizing effect of slavery — What animals have 

 done for us — Unused materials — Lost possibilities — Domes- 

 tication a gradual process — Species that were domesticated 



IV. Need of Improvement in Domesticated Animals 



and Plants 35 



Natural species not perfectly adjusted to our needs — Main- 

 tenance of animals costly — Further improvement needed — 

 Need of more economic service — Some individuals better 

 than others — Economic significance of differences in efficiency 



— The fact of variability established — Variability in a single 

 character — Historical knowledge of original species needed 



