132 C H A P T K R 37. 
lication. A fpecles of Sedwn is the only 
indigenous plant contained in it. 
Bradley gave a courfe of Leftures on 
the Materia Medicdy in London^ in the year 
1729, which he publifhed in 8*, in the fuc- 
ceeding year. He died at the latter end of 
1732. 
Although Bradley's writings do not 
abound in new difcoveries, yet they are not 
deftitute of interefling knowledge, coUedled 
from contemporary gardeners, and from 
books. He was an advocate for the circu- 
lation of the fap, and made feveral new ob-^ 
fervations on the fexes of plants, in confe- 
quence of the produdion of hybrid fpecies, 
by which he added ftrength to that doc- 
trine. He wrote inftrudively on the gems 
of trees ; on bulbs ; on grafting y and par- 
ticularly, on the methods of producing va- 
riegated and double flowers. 
On the whole, Bradley's writings, 
coinciding with the growing tafte for gar- 
dening, the introdudion of exotics, and 
improvements in huibandry, contributed to 
excite a more philofophical view of thefe 
arts. 
