CONTENTS. 



CHAPTEE I. 



* 



INTRODUCTION. 



Domestication Characteristics of a Species Creation of 

 Eaces and Varieties Lost Types of the Animal King- 

 dom Modified Species Domestic Animals of Inferior 

 Orders Pisciculture Creation of New Eaces of Fish 

 Cultivation of the Lower Animals . . . 1 8 



CHAPTER II. 

 SILK-PRODUCING 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 Bornbyx 



