X PREFACE. 



cares of the filature even further than that of making market- 

 able raw silk, which is not frequently attended to by silk 

 growers. It is on this principle only, meaning that of divid- 

 ing among various branches, hands and stages, all the 

 operations required for the cultivation and manufacture of silk, 

 that national wealth from this rich produce can be depended 

 upon. One only individual cannot be a perfect operative in 

 all stages and divisions of the art, but he can become skilful 

 in many or several of them, if at each degree he command a 

 marketable produce. I conclude with observing that the 

 work of Mr Jonathan H. Cobb deserves the confidence of 

 the public, and its circulation should be encouraged. 



FELIX PASCALIS, M. D. 





