CONTENTS. 



CHAPTEE I. 

 INTEODUCTION. 



Domestication Characteristics of a Species Creation of 

 Eaces and Varieties Lost Types of the Animal King- 

 dom Modified Species Domestic Animal a of Inferior 

 Orders Pisciculture Creation of New Eaces of Fish 

 Cultivation of the Lower Animals . . . 1 8 



CHAPTER II. 



SILK-PEODUCINQ INSECTS. 



Chemical Nature of Silk The Spider's Web Bombic 

 Acid Detection of Wool in Silk Great Variety of 

 Insects producing Silk The Common Silkworm, Bom- 

 byx mori The Golden Tree The Province of Seres 

 and the Morea Prolongation of Life in Plants and 

 Animals Artificial Incubation and Eearing of Bombyx 



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