. 

 HISTORY OF THE SILK-WORM. 23 



400 cocoons to weigh a pound, and 4363 are required 

 to afford a pound of pure silk. 



4. Silk-worm of Two Crops. In Windham, Conn, 

 they have a small pale white worm, which agrees in 

 many particulars with both of the foregoing ; if this, and 

 each one of them, are not one and all identically the 

 same. This silk-worm goes through its various muta- 

 tions in 20 days, and produces fine white silk, which 

 has the valuable property of retaining its clear white 

 color. The worms produce two crops, though the 

 quantity is less than that produced by the large dark 

 colored, or by the large white worm. 



5. Silk-worm of eight crops, or Daccy. At the silk es- 

 tablishment of the British East India Company at 

 Jungepore, in Bengal, besides the common silkworm, 

 which produces but a single crop annually, they have 

 also another silk-worm, called Dacey, which produces 

 eight crops or harvests, and is supposed to be indigenous. 



6. Friuli Silk-ieorms. There is a variety of silk- 

 worms found in Friuli, so very large, that two of these, 

 when fully grown, will outweigh five of the common 

 kind ; and their cocoons weigh almost in the same propor- 

 tion. The quantity of food is 1-10 less in proportion to 

 the weight of cocoons produced, than the common 

 kind, but they require five or six days longer in their 

 evolutions before they begin to spin. Their cocoons 

 are four times as heavy, as those of the small variety of 

 silk-worm. Each cocoon yields nearly 8 1-2 grains, and 

 measures almost 1300 yards; and 100 cocoons weigh 

 a pound, and 1091 will yield a pound of pure reeled 

 silk. Friuli silk is said to cause more trouble and 

 waste in its manufacture, than that of either France or 

 Lombardy. This may be owing, either to the breed of 

 silk-worms, or what is much more probable, to its being 

 imperfectly reeled. 



