O F S I L iC. 179 



Confined place which brings two worms to 

 fpin in one ball 5 and therefore the largeft 

 and ftrongeft of the double ones would be 

 as good as any for breed ; and as they 

 can't be winded off would be fo much 

 faved : but as they are twice as ftrong as 

 the fingle ones, the moths cannot well 

 make their way out, therefore you had befh 

 cut them with a pair of fizars, and take 

 out the chryfalis, which being laid in a 

 box, and covered about an inch thick with 

 chaff, will change to a moth as well as the 

 reft. 



An hundred males and an hundred fe- 

 males will together produce about an ounce 

 of eggs, from which computation you may 

 determine what number of balls you will 

 keep for breed ; and you fhould rather 

 keep too many than too few, to prevent 

 failures which may happen either in the 

 moths coming out ^ or their breeding ; or 

 the eggs which are to be kept till the en- 

 fuing year, fome of which generally decay. 



The balls which you choofe for breed 

 being thus fixed upon, take a pretty ftrong 

 thread and with a needle pafs it through 

 the outer filk of the balls, taking care not 

 to hurt the animal which is inclofed, and 

 N 2 having 



