114 ON SHEEP'S WOOL. 



lar grains, grey when the wool is white, and blackish 

 when the wool is of that colour. 



Q. How do the winged moths take the form of a 

 butterfly ? 



*/ f . When the winged moths have got their growth, 

 the most of them quit the fleeces to withdraw into 

 little obscure corners of the wool store, and attach 

 themselves thereto by the two ends of the case, or 

 suspend themselves to the ceiling by a single one. 

 Then they shut the two openings of the case, and 

 change both form and name, and take that of chrysa- 

 lis. They remain in this state for three weeks ; af- 

 terwards these insects bore the end of their sheath 

 nearest the head, and come out in the figure of a 

 butterfly. 



Q. Can wool be preserved from damage by moths? 



A. To this time, no means of certainly securing 

 wool against damage by moths, have been found, 

 but it may be in part avoided. Let your wool store 

 be ceiled and white washed on the walls and sides, 

 in order that the winged moths, that light upon 

 them, may be more clearly seen : put the wool 

 on hurdles, which may be supported at a foot above 

 the floor, or pavement : have a stick with one end 

 terminated by a covered button, like that of a fenc- 

 ing foil. When you enter the store, you must 

 strike upon the wool and hurdles, in order to make 

 the butterflies fly out, which will light upon the wall 

 and ceiling, where it will be easy to kill them with 

 the stuffed end of the stick. By often repeating this 

 search between the end of April and the beginning of 



