[ 175 ] ^2'Z 



Page. 



Diseases of silk worms, ....... 125 



from defect of eggs, ---.... 125 



mismanagement of good eggs, - - - . . 126 



bad air of the district in wliicli silkworms are reared, - - 126 



want of room, ---.,-. 130 



quality and quantity of fooJ, - . . . . 130 



change of food, ---...- 131 



peculiar constitution of the all", - - . - . 132 



sudden changes of temperature, .... 133 



particular diseases of ...... 133 



Doubling machine, and cut, ....... 151 



Draw-boy, improvement in, - . - r - - - 164 



Dying of silk; see the various colors, ,....- 182 



E;*rly food, to secure --....-. 125 



Eggs, preparation for hatching, ...... 57 



signs of vivification of the wonn, - - - - - 63 



Eggs, preservation of, - - - - - - . - 112 



number of, in the varieties of silkworms, - - - - 1 13 



facts relative to the pixxluction of, ..... 115 



produce of silk from an ounce of, ..... 113 



proportion of to cocoons, ...... 118 



Evidence, minutes of, on silk, before tlie House of Commons, - - 180 

 Fanshaw's apparatus for spinning, doubling, and twisting, or throwing silk, 



and cut, ..-.-.... 176 



Feeding, frequent, necessaiy in tlie fouith and fifth ages of silkworms, 97, 123 

 ■fires, light blazing fires of shavings, straw, or light wood, useful in damp 



weather, to promote warmth and a circulation of air ia the laboratorj', 89, 96, 123 



Food, on securing early, for silkworms, ..... 125 



diseases from quantity and quality of . - . - - 130 



change of ...... 131 



table of, for silkwonns in difPereut ages, - . - - 181 



Grasserie, a disease of silkworms, ...... 133 



Green, to die - - - - - - - . 192, 217, 220 



Hatching of silkworms, ....... 61 



moths, . . ■ ... 109 



History of silk, . . ..... I7 



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



natural, of the silkworm, - - - . - - 27 



Hedges espaliers, or cabins, to prepare - - . - - 98 



Hot-house for hatching sdkworms, ------ 59 



Hurdles, or feeding frames, to clean, ----.. 99 



Hy,^^rometer, use of, a simple one described with a cut, - - .129 



Improvements in silk machinery, ..... 155^ 177 



India, E^st, natiye silkworms of ------ 36 



Indigo blue vat, to prepare - - - - - - -189 



taboratoi-y for silkworms, construction of - - - - - 54 



newly hatched worms, - - - - - 68 



J^eaves, young seedlings of, not projjer for old worms, - - - 52 

 only to be given to young worms, - - - -75 



chopping of, deemed necessar)-, but doubted, - - 73 



importance of picking clean, and without fruit, - - - 81 



old, to be given to worms after the fourth moulting, - - - 91 

 quantity consumed in different ages, by worms from an ounqe of eggs, 



(Seealso the table, p. ISO,) - . . '. . 114 



calculation of labor and profit from an acre of, in Connecticut, - 119 



should be gathered a few hours before being used, - - - 122 



Lettuce, will sustain young worms, ------ 62 



Juight, injurious to silk mottis when hatched, and when coupling, - - 109 



Lilac color, - . . ., . . . . 193 



l^oom, Sholl's sUk, explanation of figure of, - . . . r 157 



for weaving figured stuffs, ...... 166 



■for weaving ribbons, ....... 172-^ 



