on the Briti/h Species of Carex. 21I 
are examined, the more ftriking are their differences. Still, how- 
ever, much is due to the confideration of practical ftudy—He is 
the beft mechanic, who produces the greateft effect, by the leaft 
given power: and thus, in a ftudy like ours, he who difcriminates 
moft plainly, be the plainnefs fimple as it may be, difcriminates 
moft laudably and fatisfactorily. 
_ There are four points of fome importance to the completing of 
the arrangement of the Carices, which I have fcarcely touched 
upon, viz. the defining with exaétnefs the true limits of the ge- © 
neric character—the fettling of the fynonyma—the colle&ing and 
fettling of the effential differences of the foreign fpecies—and the 
drawing out microfcopic defcriptions of the parts of fru&ification. 
My obje& is attained, if I have contributed at all to the knowledge 
of thofe of our own country, and that by means open to eafy ob- 
fervation. 
Before I conclude, I muft beg leave to return my particular - 
thanks to Dr. Smith for the opportunities he has given me of con- 
fulting the Linnean Herbarium ; and efpecially to Sir ¥o/eph Banks, 
whofe matchlefs library, and moft extenfive collections, fo liberally 
open to the perufal of all real lovers of Natural Hiftory, were of 
moft eflential íervice to me in the execution of this 'Tra&. 
Eez XVII. Oz 
