Flora Cestrica. 177 
are an inch or more in diametér: They are perfect gems; 
and will probably prove to be cinnamon stone, or essonite. 
idem. 
XXIV. Native Gold. —A mass  weigihes 84 er = a 
conical shape, and having adhering to it a numb mall 
crystals of quartz,) has been found in ey ate ve 
occurred in an alluvial situation, consisting ‘ of thin strata of 
clay, sand, and water-worn stones. he rocks tm situ are all 
of the primitive class, consisting of hornblende, hornblende 
slate, and green stone porpayrys which are often found alter- 
nating with mica slate.”—Jdem 
V....*# Blora Cestrica ;—An essay towards a Catalogue 
of the ican. s plants, native and naturalized, growing 
in the vicinity fel the berough of West-Chester, in Chester 
county, Pennsylvania: with brief notices of — ies 
and uses, in medicine, rural economy, an : to which 
is subjoined an Appendix 2 the useful caliated p plants of the 
same district. By WILLI ee M. D. We 
Chester, Penn. 1826.” =. 152, 
been done within a ae a to facilitate the in- 
vestigation of the botany of the United States. The author 
of this work began his investigations at a time when, to use 
wn expression, ‘. the works which professed to 
much difficulty in examining our native plants, from ane 
want of satisfactory aids, he es determined to. A Sipe 
catalogue of the plants of his district, thinking that, send 
the lovers of botany throughout decoding: follow -his exam- 
ple, et would thus be grades: collected for a com- 
een given to this science in our country, by the labours of 
are highly creditable t » the authors, and wpinable auxiliaries | 
to the botanical stude 
The work before _ though limited: ax thee scope to 
plants of a small district, is by no means the least creditable 
of our botanical publications, and is one which no lover of 
the science can willingly dispense with, Ina country so ex- 
tensive as ours, and so varied by climate, soil, and agricultu- 
rali ts, the same species of plants must assume va- 
23 
AQk. XH. Ne. 1 
