FOOD OF SILKWORMS. 



437 



5. Worm twenty-one days old. 



6. Worm Thirty days old. 



7. Worm Forty-two days old, and ripe for drawing or spinning. 



8. Gut sack, there being two in each worm. 



8. 



THE SILK-WORM. 



The grub is fed upon fresh unfermented mulberry leaves, gathered 

 and conveyed daily in clean baskets. The leaves are cut up with a sharp 

 knife and well scattered over the insects. In three days, these grubs, 

 which are protected from any great change in temperature, become 

 dormant, and awake after four days' rest, when they are fed more 

 abundantly. Having now cast their first coat, they are from that time 

 called worms ; but they again become dormant. In fourteen days they 

 eat whole leaves voraciously, and sleep again. When three weeks old, 



