New-York daily tribune., 1855-08-20

"a -
Seuta Crux.......-- 10 IS M
Sen FrAneiseo.......'''''. IL 81 pr
Bodego. ....... II 10 B =
Fu-ltoldt Bay. ...... n 50 e 10
Port oic............s.. II - II
Cape Dssppo ntnent II no
The results are from not less than one moo.h. =.
servs,ioIs in any cese, and generally from mors h'
two Saxions self registering gauges were used q -
urincpel setons and the ordinary box or stat s,r~
Al the intermediate ones. The series Of tidal sss
were urder the chsrge of Lieut. W. p Tr0wbusss Il
of the Corps OF Engineers, assistant IN the coas a.
vey and the reductions of assistant l.. +. Poursals
OF the stations enumerated. san Diego ant S.e n i
6ro form one group; san Luis Ooiseo, Moa,er, Il
Santa Cruz, San Francisco, aud Bodego, secoo.
and Humboldt, Port Oxford, and Cape Dsappor |
ment third. Treating the two last named groups !,
the method OF loast squares, the directions OF the
tidal In es their denomination and distances apart A.
determined. OF these denominations, the last Is a, 4
certain rot agreeing with what is known IN re2gl |
The 6epth off The coast. The directions very ce
sstert and so are the deDomin ztioDs. The co1s
lines of IL ard 20m Gre. Dwich ass aEong the ces
from San d., 60 TO Point Concepcion, conforming AL
ceuernl way to its direciIon. Be ween Pf Concepsf
and Cane Mendocn. the lines of H. ls, l9 and 20 a,
are ioui d. he line Of IL hours meeting the ceast s
Pr Concet cOn: ls hours uear San Simeon; ~ boa
nenr Pt. Aio Nuevo; and 20 hours near Pt- Ana,
IN, coiida III 80 making aDg le of about l0o wsl
the ccast The cotdal lines OF 20 hours follow u Il
coast from Cape Mendocine 10 Cape Diappoil,mesl
the projecting PORTIONS of the coast havlag son.
what earlier hour and the IeoediDg httle later l
sketch of the western coast of the United Stsles fno
San Diego, California, TO Cape Fiattery, Wasainga
Territory accompanies the papor-tbe positions Of n
stations and the cotdel hours derived from obseTt.
tiors being marked upon 1t rhe straight lines d
rived from the discussion OF the groups of stations
the ootide lines aud tie tra cohda curves drsn
uuon the sketch. The forms now gives To the ceaa
liIts of the western coast are those 10 which the d.
vious api roximGtons were tending. In the ear6s
nan Of The Rev. Mr.. Whewell the lines were negyl
uerIet dicular 20 the coast The sunsequent map d
Adnirsl Leetke diminished the angle, and the Mn
recent one I'm lsss) OF Mr Whewe brings then II 4
perrer TO paraileism 20 the coast. The presotsh !
esryaiiOn-, though not quite complete IN all IA |
oroups leave no doubt thar the lines are but sigls
Inclined to the coast, and follow tue great dlyeie
when the general bend changes materially. hsl
DIVISIONS are from San Diego 10 II Concepclon hen
10 Cane Mendocine and thence TO the Colamal
River The conclu.ion that the phenomena 0bserul
are chiefly hitoral il drawn from this discussion 4
from that OF the cotida III es of the Atlantic cost
Prof AGAssIz regarded il more than conedssI
that the three groups OF tidal stations had the sz
boundary with the three geological regions into whd
he had arranged the fishes collected by the Cost Srl
yev which had been submitted TO his study. lie Hr
leb cd for the fist time the relations of the tides si
the cstTibuuon OF fishes.
Prot PIERCE thought that very little light hsd bed
thrown on the great tidal wave Of the Pacific, fre
the fact that these were only ittoral tides, and hx
therefore though of great value for the future nest
further investigations bef ne they could come into ~
II u.s. the observa ions the fixed stars are sutfcal
to estimate the paralle1 of some OF them wheo 4.
known that they must have parellnx but were ~
not otherwise Known. these obsery atoms could =
be use 10 prove its existence. n
Mr. BLAKE thought These tides were further md
fed by submarine chains of mountains of the coas.
Mr.. W. b. BLAKE then made some remarks O1S
geology of California, from observations by the ts,t
States Survey for Pacific Railroad
Alter a minute description, by the aid OF map
the Californian geography, Mr.. Blake said ths,4
Sierre Nevada was composed principally Of grsas
with meiomonbic states. In the T,jou Pess
dip wac nearly vertical. On the eastern side ss1
limestone beds ard quartz rock. The limestone VI
much like the white crys aiDe limestone of New-jenl
apd contained graphite. In pass iorty miles % II
south the same rocks were found with the exception
the quartz and there were some intruslons OF porpnf
The hour of dinr er having arrived, Mr. BLAKEsH
per wss postponed until tomorrow.
AF1ERSoos SESSION.
The Section of Matnemstcs and Physics me
Manning Hall. Prot HENRY WAS elected Presiixt
and Mr.. CHAUScY WRIGHT secretary.
Standing Committee-W. c. Red6eld Prot. MslSi
Prof. Loonis.
ADAMS PRIZE PRoBLEM-By Pref. PsVes, Par II
The action Of Saturn would tend to bring 81
inAexible ring against ITSELF But if almost the SiNk
macs of the ring were gathered into a moon, es'al,
tie rest a ring not worth the name, then ulst't
revoye as a satellite, with the same eide algNsFI
ward lie primary h. ring at all events N st rcs'I'
around the planet in about ten nOprs, 20 hat wer
solid any inequality seen on one side would be ca III
otler in about five hours. But IL Is often red
have an inequali remain o. the same sde
number OF DAYS. Now If the ring be hqshH s'.it
rcvoye win a different velocity Tor different van'tt
lie rinc 20 ttat radius vectOr would pass oyGa'I
a,ois in equal tines Those pars ID peigee,stf
sreak woulo ther fore b. smaller and thinner M
portion 10 the velocity and equa quantues oi ~ I
woulc pass any point al all lmes In thus stm
planet does nothing 20 sustain or destroy me ~
ibrur OF the rin1, but the attraction OF the ezs'l
SATELLITES would tend 70 maintaiu i's equli0nun' j
DIscr ssIoN If the Secular Variation IN The Aagrt
D,chE0tiOn on the atlantic and Gulf COas, I'D
United Nt0fes, from 0bSerUatl0H IN the I'm ~
and 18Th centuries. By CHARLES A. scseI,
Unitfd States Coast Surrey. Read W III
HIYAaD.
Mr.. ScHoTr has been collecting and ia5ssA
focords Of magnetic decna'ion, dating from 1917 n
the present time. Some surprising mistakes have ~
found in the most eaborate European works 90 az.
can cecliDatOns Using a line 70 lresentmg yeaH
ejtclrse dln cegreer Ol neclih'lOh o. "N-,- -.
lire connecting the observations made At tne ~
fpo' form curve that seems 20 be part OF Sr
Of waves but unfortunately the Lne OF oOss's,.l
has been too short 70 have more than oaleii ~ ~
pl,tod u single wave. Places near each oiner II
Boston and Cambridge, have different curves qua u :
orally the higher the latitude the higher tae wave
Ulhces in Northern Stsies have had "ee'srn
ioIs Only, and ihese are iDcreasiog, hayinz .. - &
their poi Of lessI 5ecliuaOr a. nearly tfe ssns
The section having charge cf Chemistry, Ge'@
and Natural History, net in Manning Hs1 b
o'clock. Prof smLNAS, sen., in The chair. II
Mr.. w. b. BLAZE eahitited a number Of CsIN'1
rocks, some Of them fossiiierous One Of them
curing in a stratum 50 ieet thick was compo'ea 4