150 THE SILK WORM. 



The Passis, the last disease to which the silk-worm 

 is subject, is occasioned by too much heat in the ear- 

 ly state. The body in this disease becomes thin, and 

 the appetite destroyed. The only thing necessary, 

 is to remove the diseased worms, ventilate the room, 

 and feed temperately with young leaves. 



COCOONERY. 



. All that is requisite in building a cocoonery, is to 

 have a house capable of being well ventilated, or 

 closed up, so as to exclude moisture, wind and cold. 

 Many persons use barns, sheds and rooms in their 

 dwellings, which being fitted up with shelves, answer 

 the purpose very well. In some parts of Turkey, a 

 room or rooms are always appropriated to this pur- 

 pose in their dwellings. 



In furnishing cocooneries, Mr. Cobb gives the fol- 

 lowing directions: "I have used three tiers of rough 

 pine boards, fixed upon upright posts, about four feet 

 in width, one above the other, with a space between 

 of two and a half feet, affording room sufficient to 

 pass all around the frame, so that I could reach any 

 part of it. In making the shelves, it is well to have 

 the lowest one six inches broader than the one above 

 it, and to make the same difference in the shelves 

 above, so as to break the fall of such worms as happen 

 to tumble down." Mr. Cobb describes another me- 

 thod as follows : 



" It is about two and a half feet wide, by five or six 



