; * 
444 Miscellaneous Intelligence. 
its weight by calculation between thirty-eight and thirty-nine tons. An 
overhanging ledge of the same kind of rock is situated up the hill, thirty 
feet above the spot whence the mass under consideration commenced 
its slide 
There could be nothing very remarkable in the movement whi ch 
oceurred on the night of the 12th, but for the nearly level surface 
across which it moved. It is agreed on all hands that the angle of de- 
clivity peso the entire distance which was eighty feet, was only 
from 13° to 15°40’. The entire descent for the distance, or the differ- 
ence ation, the — and the present level of the:mass, is but eigh- 
teen feet. es ne did not turn over in.its course. The surface over 
which the mass: eth: isa gradually inclined plane, unmarked by any 
natural furrow or depression. . The soil.is'a common Idam, five or six 
inches in depth, while the subsoil isa cohesive red clay. The field 
had been under cultivation for several. years. A'crop of wheat was 
raised upon it the year previous; and of course the ground was net 
by*green sward. A few coarse stones and pebbles.are 
akc 
There was much vegetable matter accumulated® about om rock (in its 
urfa 
Gein ee in a state of decomposition. ‘The ce of the 
ot blackened as if it had been acted upon yi, but is cov- 
ered wie and there with the customary growth of |i A mag- 
chen mag 
netic needle brought near it is esa turned aside from the —— 
meridian. 
In. its deseent, it ut abeongh; or tore mania nurierous mete (of 
living trees); some of whicli were two or three inches in diameter. It 
cuta trench from ten to thirteen feet wide and about ~— feet in 
= » Spreading the soil to a distance on-either side as it m 
re is no very considerable accumulation of soil in He ws of the 
stone as it now lies, although portions of the red subsoil appeared scatter- 
ed down the hill from thirty to eighty feet in front of its present location. 
There was rain attended by thunder and lightning on the, night of the 
slide, Bit unaccompanied by wind ; and nothing presented ‘itself in the 
ippearances near the spot to indicate a water-spout or any ops fall 
of water hi 
suggestion to account for the removal of the stone pe 
made, is that of J. W. Hudson, Esq., the Principal 
; s the following: at the lower side of 
ess, weighing eight or nine tons. Mr. H. os 1 
end of the sliding rock was s supported 1 ‘upon ‘this, which, giving — 
produced the motion,,which on the ordinary laws of -gravita 
the mass down the inclined plane. From this opinion Dr. Kersh strongly 
issents, as he thinks that the shape of the moving mass compare 
with that of ~ ata bed it occupied, proves such a position | to have 
been i _o 
s to the Mycology of. North America. ae eer 
e following additional remark to his article, page 34) Un- 
Helic eyi:—add “I suspect that this fine species - dial 
form the type of amew genus, for which I propose the name Systrephium. 
