320 On the Meteors of 13th November, 1833. 
Q. laurifolia. Very frequent on sandy soils of little fertility. Its 
leaves are perennial. 
Q. Alba (white oak), Q. obtusiloba (Post-oak) Q. falcata (Black 
oak) are common. 
Pinus Palustris, with Quercus Catesbei, and Q. nigra cover vast 
tracts, some of which are very sterile, and others tolerably produc- 
tive. Inthe former, the Pinus palustris is accompanied by the Quer- 
cus Catesbai, and in the latter it is accompanied by Quercus nigra. 
Pinus teda var. heterophylla, El. grows in the hummocks to a 
large tree, called, in the country, ‘ white pine,” from its resemblance 
to the northern white pine. 
Pinus variabilis grows on the Spanish old fields near Tallahassee. 
Yucca aloifolia grows on the sea-shore. Y. recurvifolia and Y. 
Jilamentosa in the interior. Of the last species there is a variety pos- 
sessing a longer and narrower leaf than the common variety. 
Heuchera americana grows from five to eight feet high. 
Hymenopappus scabioseus grows plentifully around Tallahassee. 
Datura Stramonium (Jamestown weed) and Verbascum thapsus 
(Mullein) are not found except in a few places where they have been 
lately introduced from the states. This confirms the opinion of bota- 
nists that these plants have been introduced on the American conti- 
nent. 
Lake Lafayette, near Tallahassee, March 1, 1834. 
Art. VIl.—Investigations respecting the Meteors of Nov. 18th, 
1833.—Remarks upon Prof. Olmsted’s theory respecting the 
cause; by AtexanpeR C. ‘Twinine, Civil Engineer and late 
Tutor in Yale College. 
Tue writer of this article had the privilege of witnessing the me- 
teoric display, on the morning of Nov. 13th, 1833, from a few 
minutes past 5, by the watch, till day. Since that time, he has had 
opportunity to collect well authenticated facts from observers in dif- 
ferent places, and, by reflection upon the facts which he himself wit- 
nessed and those which he has learned from other observers, has ar- 
rived at conclusions satisfactory, in some measure, to his own mind, 
respecting both the facts and their cause. So far as these conclu- 
sions have coincided with those embodied in the extensive and val- 
vable discussion of the same subject which has been given to the 
public from the pen of Prof. Olmsted, it will not be necessary to dwell 
