SIMILAR DISEASES-. 349 



whose petals are, not iiDconnnonly, stained 

 all over with this powder. Our knowledi»;e on 

 all these .subjects is j^etin its infancy; but it 

 is to be hoped, now the pursuit of agrirulture 

 and of philosophical botany begin to be, in 

 some distinguished instances, united, sucK 

 examples m411 be followed, and science di. 

 rected to one of its best ends, that of im- 

 proving useful arts. And here I cannot but 

 mention the experiments continually going on 

 \mder the inspection of the ingenious Mr. 

 Knight, of fertilizing the germeii of one spe- 

 cies or variety with the pollen of another 

 nearly akin, as in apples, garden peas, cScc., 

 by which, judiciously managed, the advan- 

 tao'cs of different kinds are combined. Bv 

 the same means Linnaeus obtained intermi?- 

 diate species or varieties of several plants ; 

 and if any thing were wanting to confirm his 

 theory respecting the stamens and pistils, this 

 alone would place it out of all uncertainty. 



