or 



DIVERSITY 



SILK GROWER'S MANUAL. 



equal degree of moisture with but little inconvenience. 



But if a silkworm be introduced into a jar charged 

 with carbonic acid gas, which would cause a bird or 

 any other warm-blooded animal to die instantly, although 

 the worm will soon exhibit signs of suffering, yet it will 

 live from ten to twenty minutes ; and on being with- 

 drawn from the receiver, in due time it will exhibit no 

 signs of injury, but be apparently as healthy as before. 



Some have supposed that noise disconcerts them ; 

 but this appears to be a mistake, or at least not suffi- 

 ciently proved : on the contrary, the experiments of 

 the Abbe" Rosier, in France, tend to show that it does 

 not trouble them at all. 



CHAPTER V. 



THE MULBERRY (Morus). 



The Mulberry, or Morus of the botanists, is a genus 

 comprising many species. It derives its name from 

 mor ; in Celtic, Hack. Its origin has been assigned to 

 China, but several, species have been found growing 

 in the wild state in America. 



It was cultivated at a very early period of time, in 

 western Asia, and in Europe ; but at first only for its 

 fruit. This is a berry of a roundish and oblong form ; 

 in color varying from white to red and black ; its pulp 

 envelops numerous small seeds. 



