OF SILK. 23 



whether they have found kernels ; this is 

 eafily obferved in the black mulberry, which 

 has pretty large feeds, but not fo readily in 

 the white, whofe feeds are very fmall. 



In the more temperate climates it is ne- 

 cefTary to have good trees, well manured, 

 and in a good afpe6l, in order to have 

 found feed and well ripened 5 and, in any 

 climate, it would be ufeful to have a few 

 trees of the beft growth peculiarly fet a- 

 part for feed. And if, for want of better, 

 you are obliged to make ufe of the feed 

 from trees whofe leaves have been pulled 

 for the worms, let it be from thofe trees 

 which were laft ufed, viz. when the worms 

 were in their laft age, which have their 

 fruit pretty well grown before they are dif- 

 leaf d, for the berries are hindered to fill 

 when the leaves are puli'd early. If the 

 berries are ripe on any tree whofe leaves 

 you have occafion for, it will be convenient 

 to fhake the tree moderately every time 

 before you pull the leaves ; for fo you will 

 both fave the fruit for feed, and hinder it 

 from mixing with the food of the worms 3 

 and on this laft account you fliould pre- 

 ferve for feed thofe trees which are fo great- 

 ly loaded with fruit as to have but few 

 C 4 leaves, 



