32 



VEGETABLE SUBSTANCES. 



than others, in the quantity and quality of their pro- 

 duce. Some yield their downy harvest twice in the 

 year, others only once. Some bear cotton of a long 

 and delicate fibre, and of a beautiful whiteness, 

 while others are found to be short and coarse, and 

 of a bad colour. For want of this knowledge, so 

 little regard is in general paid to the selection of the 

 seed, and the improvement of the stock, that the 



Cotton ; showing a pod bursting. 



