140 ON REARING 



if they are crowded, they spin with difficulty ; and, more- 

 over, their silk will be difficult to reel. The cocoon rooms 

 must not be established in places exposed to the northeast, 

 nor where domestic animals are raised ; neither under trees, 

 above a hole, nor near places covered with manure or stag- 

 nant waters. 



NONG-SSE-PI-YONG. 



The following is the manner of establishing the cocoon 

 room : A dry and warm place must be chosen, in order that 

 neither the cold nor dampness can penetrate into the interior 

 of the cocoon room. When the worms approach their ma- 

 turity, a fire must be lighted upon the ground where the co- 

 coon room is to be located, until it is perfectly dry ; after- 

 wards the remains of the fire and the ashes must be swept 

 away, and the cocoon room constructed. 



SAME WORK. 



Six diseases of silk worms are noted in the cocoon room : 



1st. When the silk worms dirty the cocoon room ; 



2d. When the silk worms fall in the cocoon room ; 



3d. When they move about without spinning ; 



4th. When they change in red chrysalis ; 



5th. When they turn white and die ; 



6th. When they turn black. 



The foulness of the cocoon room arises from portions of 

 leaves which the mature worms have brought with them, 

 they ferment and produce a fatal moisture. 



The five other diseases always result from the moisture 

 of the ground, or the cold of the exterior air. 



