150 ON REARING 



jar is entirely full. Then the jar must be hermetically 

 closed, by covering it with clay. 



WOU-PEN-SIN-CHOU. 



When silk worms are to be raised, the eggs to be procur- 

 ed from the cocoons, must be thought of before any thing 

 else. Now-a-days, when the cocoons are collected it is the 

 custom to keep them altogether upon the frames. Some 

 persons not having time to reel all their silk, butterflies are 

 seen to go out and lay eggs almost immediately. The ac- 

 cumulation of cocoons produce a kind of fermentation, and 

 the heat causes the butterflies to hatch before the proper 

 period. This premature developement has never any good 

 results, for the butterflies are sick ; and from thence it comes 

 that the silk worms produced from their eggs, are affected 

 by diseases from the moment of their hatching. 



When the cocoon rooms are opened, (if one wishes to 

 have proper cocoons for reproduction,) those must be cho- 

 sen, which are found in the upper part, and which are turn- 

 ed towards the light ; those are strong and well conditioned 

 cocoons. They ought to be separated, and put in a well 

 aired chamber, and spread upon very clean mats, a layer of 

 the thickness of a single cocoon only. After the cocoons 

 have rested upon the frames the necessary time, for the me- 

 tamorphosis of the chrysalis, the butterflies go out them- 

 selves without being affected by the diseases which we have 

 described above. 



SAME WORK. 



A large number of persons are required to select, at the 

 same time, all the cocoons which may be wanted ; they 



