13. f 175 ] 



TABLE OF CONTENTS. 



CHAPTER I. 



Page. 

 History of Silk, - - - - - - . -17 



" " in the United States, -----. 21 



Natural History of the Silkworm, - - - - - 27 



CHAPTER n. 



Varieties in Silkworms, --------35 



Of rearing- two or more crops in one season, in the United States, - 36 



CHAPTER nr. 



Of other Caterpillars producing Silk, ------ 39 



Of the Bughy or Tusseh, and Arrindy silkworms of India, - - 40 

 Of the Chinese worms, which do not spin cocoons, but produce threads 



and attach them to trees. ----.. 41 



Of the South American silkworms, - - - - .41 



Of the native North American silkworms, - - . .42 



CHAPTER IV. 



Of Mulberry trees, -.--.--. 42 



1. Of the native red mulberry, and its varieties, - - - - 43 



2. Of the white mulberry tree, and its culture and varieties^ - 44. 



3. On the proportion of leaves to an acre, and to silk produced from 



them; superiority of the leaves of seedling trees; cautions on picking 



leaves, - - - - - - - - 51 



4. On mulberry hedges, ---••--- 52 



CHAPTER Y 



Of the Laboratory, . . - - ^ - - . 54 



Description and cut of the Rev. Mr. Swayne's rearing frames, - - 56 



CHAPTER VI 



The art of rearing Silkworms: 



1. Of the care necessary previously to the hatching, - - -57 



2. Utility of a thermometer to fix the temperature of the room, - - 58 



3. Of the hot-house, and utensils required, - - - - 59 



4. Of the hatching of the silkworms' eggs, - - - - 61 



CHAPTER VII. 



Of the small apartment in which the new hatched worms are to be received, - 68 



Of their removal into the laboratory, or elsewhere, - • • - 69 



CHAPTER Vni. 



Of the rearing of Silkworms in the four first ages, • - - - 71 



1. Of rearing silkworms in the first age, - ' - - . 75 



2. «' " second age, - - - f. . 78 



3. " " third age, - - - - 82 



4. ** ** fourth age, ' - 85 



