PENNSYLVANIA and tha culture, 14, 15, 16. 



FHILADELPHIA and the culture, 15. 



PLATE representing the worms in their different ages, 6 : explana- 

 tion, 7. 



PLANTS, number at certain distances on an acre, 32, 34, 37. 



PREFACE, nnd authorities consulted, 3. 



PREMIUMS granted in America, 13,16, 17, 18. 



PRODUCT and profit of the Mulberry culture, 18, 19. 31, 33, 34 

 35, 36, 37. 



PRUNING, time of, 28: method of, 30. 



PURE AIR necessary, 45. 



R 



RAPP, Mr. and the silk culture, 16. 



REARING and treatment of the worms, 42, 43, 44,45,46,47,48,49, 



REELS, reeling, <S-c. Gay's, 15, 60. 



REELING simplification of, 15 : process of, 55, 56, 57 ; machinery 



frr, 60. 



RIPKA, Joseph. 10. 

 RHODE ISLAND and the culture, 19. 

 ROOM essential to the worms, 49. 



SEEDLINGS opinions of, 30. 



6EKD mode of saving, 26 : mode of testing, 2G : directions for 

 Fowinu, 26 : time of sowing, 26, 30 : supplies of, 30. 



SEWING SILK mode of making, 15, 50 : do. of twist, 59. 



BILK, mode of cleansing and ungumming. 61 : boiling 62 . sulphur- 

 ing 62 : aluming 62 : mode of reeling, <S-c. 55 : mode of dying, 02 

 to 68 : preparation of waste, 59 : do. of waste white, 59 : how 

 to organzine, 59 : markets for, 61 : method of spinning inferior 

 qualities of, 59. 



61LK CULTURE, its profits, magnitude, &c. 17,18,19,31,33,34, 

 35, 36, 37: Judge Spencer on the, 17, 69. 



81T,K COMPANIES, 17,18,19: do. manufactures, 16,17: great 

 value of, in Connecticut, 17 ; quantity raised on an acre, 33, 34 

 35 



SILK WORMS definition of the name of the, 10: early history 

 and introduction into Europe and America, 10, 13: adaptation 

 of certain states for the culture of, 14 : method of feeding the, 

 42, 43, 44, 45, 46, 47. 48 : enemies of, 53 : diseases of, 53, 54 : va- 

 fietiesof, 54. 



I SMITH, Gideon B. 3,16,42,09 ; his plan of a laboratory, 41 : his plan 

 of feeding the worms, &c. 44: his viewof the Morus Multicau- 

 lis, 28, 69. 



SPENCER, Judge opinions of the Bilk culture, 17: Interesting ex- 

 tract of a letter from, 69. 



SOIL and situation, 24, 25, 31. 



SOLUTION for soaking seed, 27. 



SOUTH CAROLINA and the culture, 14, 16. 



SPECIMENS of American silk, 17. 



STATES adapted to the culture, 13, 14, 15, 16. 



STANDARD TREES management of, 27, 31 : distance apart, 28 r 

 32,33 



SUCKERING method of, 29. 



SUPERIORITY of American silk, 15. 



TABLES, sbcwins the profits of the culture, 33, 36 : do. of distan- 

 ces of plants, 37 : do. of measures, 37. 

 TEMPERATURE, 42, 43. 

 TOMPKINS, J. Y., 16. 

 TREES, number on an acre, 34, 37. 

 TURKISH mode of managing the worms, 47. 



VALUE of the silk culture in Connecticut, 17. 



VARIETIES of silk worms, 54. 



VERMONT and the culture, 19. 



VIRGINIA introduction of the culture of Bilk into, 12 : prop-ess 

 therein, 13 : premiums by the assembly, 13 : interesting anec- 

 dotes concerning, 13 . Gee's opinions of, 14 : adaptation to the 

 culture, 16. 



w 



WASTE silk, 59. 



WHITMARSH, Mr., his plan of a cocoonery, 41. 



WORMS number which can be ftd.on an acre, 34: plate repre- 

 senting the different ages of, 6 : quantity of leat cs consumed by 

 certain numbers, 32, 37 : mode of hatching and rearing the, 42 : 

 do. feeding, 42 to 49 : rising of the, 46, 50 : various stages and 

 appearances of, 50 : enemies of, 53 : diseases of the worms, 53, 

 54 ; mode of feeding detailed, 47 : mode of feeding in the east- 

 ern states, 43, 47 ; do. in Turkey, 47. 



WRIGHT, Susannah, 15. 



ERRATA. In the 7th line of the first column of the Historical Sketch, insert "as" instead of "w/ucft," so as 

 to read "as were accessible to him." 



In the 37th page, last line of the second column, after the word cocoons read "2,400," instead of "24,000." 



Entered according to the Act of Congress in the year 1835. 



BY EDWARD P. ROBERTS, 

 In the Clerk's office of the District Court of the District of Maryland. 



