LEWIS 1). YON SCHWEINITZ. 
21 
of facts, but a judicious method in the prosecution of his 
labours. The synoptical tables attached to his several 
monographs, are evidences of the importance attributed 
to this feature in his productions. His analytical table 
to facilitate the determination of the Carices, affords 
another striking illustration of the benefit to be derived 
from a systematic pursuit of scientific studies. It con¬ 
tains an abstract view of 110 antithetical positions of 
parts, which mark the species of that extensive and dif¬ 
ficult genus; and since this analytical table was doubt¬ 
less the result, in part, of his own inductive studies, it 
proves that of those studies he was able to make a legi¬ 
timate and profitable use, by arranging all his facts un¬ 
der appropriate, general heads, and to point out to 
future inquirers, in what paths to pursue the labours, 
which himself has so happily followed. His monograph 
of the Carices of North America, soon after published, 
gave proof of the utility of this methodical arrange¬ 
ment. 
Among the most extensive, and, in a scientific point 
of view, the most important of his labours, are those 
which relate to the Fungi. Four of his principal per¬ 
formances refer to this abstruse branch of botany. 
Three of them, the 66 Conspectus Fungorum Lusa- 
tiae,” the i( Synopsis Fungorum Carolinae Superioris,” 
and the 6i Synopsis Fungorum in America Eoreali Me- 
dia Degentium,” are all, as their titles import, written 
in the Latin language. The mere reader of English 
may, perhaps, be ready to ask whether this was not a 
