New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1850-08-24
DDS Of The portion soluble In acid

might thus be brought into use.
Mr.. P. s HUsr read paper BY Prof 5cHAFFER
Of Kentucky, on the subject cfa
HEw TEST FOR THE INITIATES
Mr. Schnier's process consists in adding 70 the
solution supposed to contain nnstes one or two
drops Of yellow prussiate Of Potash These should
not be enough 70 give perceptole tioge 70 the
liquid-a few drops Of acetic acid are then to be
ADDED, and nmediately or in fe@ minutes, a.
cording to the quantity Of nitric present, the liquid
assumes p rich yellow tint.
Mr. WIN. P. BLAKE Of New Haven, read a pa
per on
ARTIFICIAL CRYSTALS or LEsQUl OXIDE OF
CHROMIUM, Cr2O3.
Mr.. showed TO the Association several speci-
mems Of cry stallized oxide OF chromium OF great
beauty. They were formed 10 reverberatory
furnace long used 70 mtnuiac .ure chromate OF
potash from chrome, iron ore. Toe crystals were
small, Of q deep emerald green color, aud ia hard.
ness, next below the dia nond. Mr.. b. considers
their formation due TO the infltration among the
bricks, of the fused chromate OF pOtash-and the
subsequent sOlutilig stion OF the potash by long
continued and uniform heat, and the reduction OF
the chronic acid 10 L etqui oxide OF chromium
The time in the Mathematical Sc ton was oc-
cupied with discussions apparently much mo in'
terestDg 10 the speakers than 10 the audience. To-
deed, the contrast between the zeal Of the Pro!es
and the Of the victims the benches
possessed all the elements Of Bai's definition OF
the ludicrJ Some interesting titles were on the
programme, As A Remark Of La Place, respect.
ing the Moor" treated by Prof Olmstei; "No.ice
OF pow erful Magnet" by Pro-. b. SillimsD. il
" The Theory Of the Solar Spots by Prof II. D.
Rogers These, however, were put aside on ac-
count OF the length OF articles on Galvanic Wave
Time Lunar Distances" &c. The meeting
concluded with an active discussion OF .ProL Mt
chels proposed method Of Registering X A and n.
p. distances Prof. PIERCE Of Cambridge presented
tuyli N shnv ho AT IN ba
neither new useful Prot. Mitchell responded
with some vehemence.
In the Section OF Geology and Natural History,
Prof G. b. ADAMS read paper on the Value Of
shells OF MolusCA as furnishing distinctive charac-
,eu,' followed by remarks feom Prot. AGAssIz,
oODHTmatory OF the importance OF shells, bu, sug-
gestiog more attention 10 the connection between
the living animal and the shell.
DR.. c. I. JACKSON read n paper on " Ancient
Po,.Holes in Rocks. Prof. AGAssIZ remarked that
the Glacial theory was not contrary to the lorna
ton of Pot Holes Prot HUBBARD made some re.
marks on the region OF country alluded to by DR..
Jackson, indicating depression OF the levels of the
country. Mr. OSBORN Of Albany described the Pot.
Holes Of Little Falls, \. Y, with the depression
oflevel of the Mohawk River.
DR.. BURsETT OF Boston, read paper prepared
by Prof GEo. Z. SHAEFFER, on fossil Coniferour
wood from the Devonisn strata OF Lebanon, Ma
ron Co. Ky" Prof. AGAsslz made some obIerva.
structure in the higher Animals" The morning
wound up with interesting paper on the Pa.
comic System by Mr. I. 8. Hunt, Of the Canada
Geological Commission
In the afternoon, the Association met In general
session. Papers were presented by Mr. c. @.
JEwEIT on q new Plan OF taking catalogues Of
Libraries to which must take another occasion 10
refer at length by Mr.. b. A. GOULD on the Gal.
vanic wave; and others by Prof. AGAssIz and
Looms. An interesting statement OF the proceed.
ings at the Charleston meeting, with some sugges-
iions for Improvements in the government OF the
Association were presented very forcibly by the
President, Prof BAcHE.
The following 10 the communication made by
Prof BAcHE, Superintendent Of the Coast Survey,
il relation 10 the
sHowING TIE RESULTS OF CURRENT OBJ.
sERVATl0Ns.
This method, while it is original. may not be
new, observed Prof Bachel though he Was not
aware that the system has been followed BY
others. Ii has some snAlogies with the rePresen'
tations of Bershaus; bat 10 different essentially
from them. The principle and an application TO
the very elaborate current observations made In
Boston Herbor under the immediate direction OF
Lieut. Chas. a. Davis, by Lieut. J. II MafH,
were shown in the diagrams presented to the As
ISOLATION IN illustration OF the presentpaper.
Observations Of the direction and velocity OF the
Currents at and below the surface have been ex'
tensively introduced into the photography OF the
Coast Survey; their Importance needs no remark.
The most Of the detais Of arrangement and sug.
gestion in regard TO the earlier observations are
due mainly 10 the late Lieut. Geo. NJ. Bache, L. ;.
NJ For much Of the success OF execution, Prof
Bache also Acknowledg sd his Indebtedness TO
Lieuts. Davis and Patterson--For Currents below
the surface, there is still wanted some sure AID
easy method of determining both direction and We
locity-especialy the latter elements
Observ atoms being multiplied a dfsrent periods
Of the current from ssckwater to slickwater, they
are projected upon diagrams showing AZ glance
the dire cton and velocity At any partc1 ar station
The average of the results 10 usually obtained ey
inspection. Dividing the intervals hssxeen slack
waters into quarters, We give the mean results for
those periods in table, and place "a 1ay pom the
chart arrows indicating the direction or SCI and
write at the extremity, numbers sho wing toe yelo-
city rate In miles per hour Ia case OF the oosss'
vstiODs made in Boston Hsrbor, the re iulss wereso
unusually numerous that the lines Of direction were
confusing to the eye and the connection bet Eeen
the results was very diiiica't 70 seize. Through
the pains taken, the motion OF tie water was
trsceable in nearly al its pecGliaslies, from the
entrance through the torsaous passages among the
Islands, alternately narroSing and expanding, to
the city vharves-
On the Current chart exhibited by Pfoi Bach.,
the direction and force Of the currents repre-
septsd by lines, the distance between which Is In
vsrsely a. the rate n miles per hour. Toe recipro
Gals OF the number Of miles per hour are here re-
presented by teuths Of inches currents OF ? ),
!, L., miles per hour being Represented OF lines
nsraIsl 70 their direcloDs and distant ). :, l.
o.7S 0o5 Of the inch. The chart was on scale OF
10000. The representation on one OF the dia-
grams corresporded q the food and in the other'o
The ebb referring to the motions Of the ;arrent from
slsch ater to slackwater, add not to the tide or
rise aud fall OF the water. If the earren' Stations
IL. III lima tam N
the curyes of motion of the water set Of toe cur
remit would become curves IL 10 easy for the nav,
sato- to seize The relations Of the currents be W"
meet even by these tangent lines, to svsh himself