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and I have been more particularly folicitous 
to colled: into one view, under each author^ 
thofe various temporary and occafional pro- 
dudtions, which, after the eftablifhment of 
the Royal Society, were communicated to 
that body, and form a part of the Philofo-^ 
phical T^rmifuBions. 
In confidering the botanical writings, 
efpecially thofe of the firft eminence, I have 
had recourfe, with few exceptions^ to the 
books themfelves ; but, Confined to a pri- 
vate collefl:ion> have yet too frequently had 
occalion to regret the want of more exten- 
five affiftance ; and, dthough I have not 
formally quoted my authorities, on every 
occafion, they will be fufficiently manifeft 
to all fuch as are converfant in botanical li- 
terature. In the hiftorical and biographical 
parts, the moft material and authentic fads, 
have likewife been derived from the refpec* 
tive authors in botany : and, not unfrequent- 
ly, I have availed myfelf of feveral of the 
older periodical publications. Exclufively 
of thefe, befides collateral affiftance received 
from feparate works, and from various col- 
leftions of fmaller bulk, I more efpecially 
X acknowledge 
