New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1857-08-17

vsters and he origin Of magnetism rocks deponted
by them. He instanced the yprings at Carlsbad, 10
Bohemia which deposit ten thousand aans annasy,
And hmestone rocks were deposited. He supposed
lsgoons of see water such those now along tne ms
Gin Of the Black Sea, and nstron springs, sucn
hose IN Hungary pouring carbonate OF maSne'a lho
tbem. They would deposit first limestone ana then
magnetism rocks, and this he though, woud eap.a,
tbe mited area of rocks Of this character, among
oshera the pumbiferous doomtes OF MISSOURI hn0''
PCT D,s1 called attention to the change OF ~s
coral lin, stones OF the Pacific into dolomte.
Prof B SlILIMAs, jr., thought that there was no me-
cessty for this action in Their case Of the
carbonate of lime and chloride OF magnesivm. IL.
M SrERRY-HUNr characterized THE effect oil emo
rice az ma nesium water on carbonate OF hne a. N
sers Pebbles pure si to- b ~s'e
What could protect them from tn's sssuhea NH"'"''
Of chloride OF magnesium watoi oxo,,;s.a
Prof SULLIVAN said that this iefuence was ehefc'e0
'ny on Gn.y oT re RutSsrs College read pa
ner NJ, the Subsistence Of the New-Jersey coast. ne
said that trees and stumps found euried aiong tne
shore are evidently, TO the careful observer ~ lne
places where they grew. In come places these sunps
amount to thousands in number, and are fosad oeeP
down 10 the marches, along the shores OF inc De"r
ware and at various places along that OF the Auahc,
at points upon Raritan Bay these remains o. trees are
found only exposed at very low tides. fellow pine
and white cedar forests found buried IN the marshes
ann tbe Passac and other rivers of New Jersey, and
upon Staten leland Specimens OF these trees retain
their smel and other chsracferlstics as ilssny as
trees and large trade is carried on IN ex
huning them for shingles and timber az Dennis vlls
marsh has been mined for timber for fifty years, and
the business there still profitable. One OF the Jog
thus found had five hundred rings, ana the speake
had seen proofs that this accumulation was the w0fk
OF thousands Of years. In another place oeiow tns
accumulation of cedar were found specimens OF gum
and magnolia. oouoo.;ons &c
trees in other parts Of the country, where al appear
snces prove that they grew on the spots wnere tney
were found In the solid upland are iouno s.uihPs
hurled several feet below the present surface ana beds
Of oyster and clam shells ten TO twelve feet above
the level of high tide Some Of the stumps now De-
low the level Of high tide have been growing trees
within the memory Of man: Near Salem, \. d.,
tide.meadow was within the memory OF the people
living near a heavily timbered upland Otner hke
instances given. surveyor OK CumOerland
County tod the Professor Of several such submerged
uplapds One gentleman has lost al least thousand
acres of timber lands by the advance OF the tides
On the east shore of Cape May the advance IS not so
rapid owing to the abruptness OF the SHORE Out the
Profess has evidence OF similar conversion oi
upland into salt marsh. Near Cape Barnegat, sumps
OF ;rees cut quite recently already submerged
Similar facts have been observed along the Kartan,
on Staten Island, and at Hampstead, Il. L. The peo-
pie OF the very hat country oil cape Hay nave sen-
t1ally noticed these taets
The objection that these phenomena arise from
difference in the hight of the tides, OWING to obstruc-
tons at the mouths of the bays, Is 0Dviated oy the
fact that the changes noticed are greater than the
limits of the tide which rises but about five feet The
pilots of New-York have noticed increase of the
depth of water in the channel but two pilots OF rue
RaItan River assure Prof. Cook that the chahnei Oh
that river is deeper than formerly.
The rate of this subsistence is shown by meadows,
which, formerly cut off from the tide by dykes win
suces now undefended, the sldces being three or
ter were detailed and also the observations of gentle
men who have observed the changes tor many years
by means of permanent marks. miller upon one OF
tie creeks Of NewJersey has lost eight inches OF his
water fall by the increased hight Of the tides at an
another mill the loss is twelve to fifteen inches and
third, built hundred years ago. ha: lost two feet
In The neighborhood of New York there are not the
same advantages for careful observation that exist at
the lower end of the State but Prof Cook Is of opln-
ion that the rate of subsistence is the same.
Prot. GUYoT thinks that the proofs OF suDsidence
clear but what gives Prof. Cooks paper part
interest the fact that the subsistence is great In
Sweden though the subsistence was but few inches
to the century il thought interesting that dis
tipguished biologists went from Great Britain to ex
anime them Prof Guyot suggested that permanen
marks should be made, and the subject carefully
studied.
of the coast and thought that these changes must b
local. and showed from his own observations no" g.
oak dying may gl be supported by its top root unii
this decayng the remains Of the tree sinks with IT,
OF forest of these oeks killed by any means, the re-
suit would be an apparent subsistence of coast when
in fact it is but local DEPRESSION So the
Charleston, s. c., have the quicksands below them
gradually washed out, ana suDsde III large hasscs vi
many acres in extent. -
Col FoRsHEY of Texas is acquainted with the oeIa
of the Mississippi and is satisfied that since 1873 there
has been no subsistence of the banks OF that nVer;
Duing the hundred years since the construction o,
leyees no change certainly has occurred. AT foft
Gibson there are proofs that there has been change
since the diluval period. Again, alluvium is filled
with water; now as the weight OF the soil increases
Tho ata,is
course sinks. Such phenomena are very frequent
throughout the entire delta. ,
Again he suggested that cypress trees sending tne
conica top roots deep into the soft SOIL, ana sanon
for a thousand years moved by the winds, would ACT
as wedges force their way downward new roots shoot
out, and thus finally give us deeply submerged
no subsistence OF the banks Of the Mississippi, he
will not attempt TO cast any doubt upon Prof. COOK
conclusions as to the NewJersey coast;
Mr. RAMSAY Of England agreed with Prof. COOK,
and thought that his observations threw much hSht
upon the slow and gradual formation Of coal fields.
Prof Cook thanked Mr.. Ramsay for his remarks, and
mentioned the preservation OF logs III Tue ceoar
swamIs of New.jersey by the sudden accumulation
ofeaves and other substances upon them in dense
forests He also showed that the phenomena men
toned by Dr. Lynch and Col. fOrshey, were different
in their character from those observed in New-Jersey
and therefure not opposed to his theory.
Col. FoRsHEY, il relation TO the formation of coal,
mentioned the fact that he has found true lgaite In
the alluv sl coil d Mississippi Near NatcheZ cotton
wood tree denuded by the action Of water presented
such an appearance Of coal that he tested by setting
il on re and it burnt for several days with all tbs APP
pearance Of coal. =
Mr. OSBORNE Of Albany suggested that during
period of many thousand years the Ise of the ocean
may be accounted ,oI by the deposits conveyed into
il by the action Of rivers and streams. Adjourned.
Mr.. L. W. HmGARD read paper yesterday after
noon on The Quantitative Assay OF Chromium by the
Bowpipe. The object of quantitative blowpipe as
says is mainly practical they are TO enable the
explorer 10 the field to determine not only the kind
but the absolute value Of the spot, so as to
IT.,