New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1873-08-28

snrrt1g nav he successfully employees for finer sedi
mem the use Of cylindrical vessels and rapid agitation
Inv o. tsiae power seem indispensable. diagram ex
limited apparatus OF his Invention Which mas voon
nav easily be separated into sediments OF any ny.
draulio value desired Certain precautions IN the use Oh
eating the decaoy OF the operations; among
these were the necessity Of excluding sunshine ana
other of heat; the cleaning OF the mario's
hot tie employed. the maintenance OF the TUBE III ~
exact vertical position 70 prevent return &
caution is very important, for u 100 nueh matera ,
used in the ANALYSIS aud the now OF seqes 80 cd
controlled, molecular aggregation cannot 0e preEtoaa
within certain limits the mailer the qldhuy ahSN ou'
Thirty 10 sixty minutes; boiling OF the material to be
ex AHMED proves absurdy inadequate TO break uP 'o
natural molecular adherence OF he parSGs O nroved
sufficient oOnctlme5 more tnan douDie even tnaI
of time Is required, and the Introduction OF mechaucai
There no proprety IN using eneilc =, h b'o
for disntegratOn unless the lnyeslgton Is W 70 r
tended beyond the physical properties OF the SOILS io
sand grains cenented ny ctloona.o VI % w found I'm
of bog and alumnO silcious aggregates, l9uhu IA
grains OF corresponding size ana Should apP, c,ay
such in the analytical statement The presence oi eI6
interferes with the dlsntcaton OF the mass oecanse
it is indefinitely dinused through the water,
aud has a Duoyant effect similar to the soluuon
S 81 s This Is aeetsd by boiling the
with successive portions OF water, ahoW.ns ~
TO settle, aud decanung the mud rms nd eont. h
the clay be warmed, and the clay preoipitated py
saturated brine. The clay thus preeipitated IS entTey
age of in present natural olays is not higher than
IS per cent The sediment or silt LETT behind when me
clay water Is decaned is rubbed or kneaded In the
vessel containing it, with rubber peste aud the process
of adding water and dccantng after setting s IRE
auentiy repeated order To obtain all tne clay mus
obtained and dred the clay forms hOrny mass uoS
TO break 1t contracts greatly in drying crmplhg ING
filter; and has usually the chocolate tint OF the ierrc
oxide with which 1t is usually contaminated put Iree
from iron 1t Is usually easily mixed WIN wa,et, Inc
latter propertyOf again uniting with water ana thereby
becoming crumblng mass like saked llne Only whenn
free from ferrc oxide-s important from an agrcnu d
point view The pure clay when dry Is tenacious ana
sticky. The appearance OF the clay water unuer tho
microscope was specifically described. , -
he IN Npl Is
the clay water treated with the eluraor ana INN
particles OF different sizes separated Dy sleVes ihs
process continued till less than milgram OF sedl-
ment with q liter or water recent seuf
ments such as river alluvums, easily and rap
idly treated than ancient ones MOST OF the Woh
should be carried on by suitable arrangements autonat
cally Soils should be weighed dried at 100 degrees
The loss In these operations with cays and suDsols con
tanning little organic other soluble matter rs
onefth 10 two per cent. In OF marked turoidly
the operation may be assisted by adding ALUM precip
Eating with carbonate OF ammonia anu ~
the weight of the precipltae the Calculated aou' %
aIumina Soils rich in vegetable matter should not as
has been proposed, be first gnited But IL Is De'er i
ali cases TO avoid the Investigation OIL such sos,
and to examine I'm preference the suDsOns' eaplo
then was shown exhibiting the hydraunc valGS ,S oe
velocity of water per second required W ctS o and
sedmeut of quartz grains OF series OF dametefs anu
pointing out the disturbing elements which intereIe
he SAMPLES exhiSted showed tnat method OF treat
ment mad at least accomplished SUCCESSFUL separation
the particles Of si,spp soils me p paper e
by calling attention to the necessity Oh uhLhs io
cianica with chemical analysis OF soils ana Ine IN,
portant bearing of the tendency of particles carried by
water TO coaesce. The results OF these expernents
%
ternary formations OF the Lower Mississippi valley
where the Bluff Loess group fails TO SHOW ey ndIAs
files of 10 feet although consisting OF all grades VI slt
sand. These tho Professor considered she DEPOSITS
of sloW-hoW ing waters The temperature oil water ek-
ertlng great influence on the coaleseence OF @ S
fact mainly due 70 the precipitation OF IA ~ di
carbonates OF lime and maGnesla, present III d seui
ments.
-FOUR EQUATIONS. PARTIALLY DIscUssED-BY DIR.
THOMAS HILL OF PORTLAND.
The first OF these equations gave the radius Of curVa
ture proportional the nth OF the ordinate, and
Dr. Hin showed that this equation includes the elastic
curve the cyclod and It's involutes certain hypocy-
cod parabola. the catenary, and variety of new
curves, to which he devotes special paper az
this meeting. The second equation represents tne
the radius and the Doctor showed that this equation
includes circles and second lnvOiute 10 the circle inc
Spira nira6ilis the paraboa, invoues OF epcyclods
the equlateral hyperbola straight nue. ana many new
curves. The third equation makes the radius OF eurya
ture proportional TO the nth power OF ire perpenoar
dropped from the origin on the tangent rms equation
included circles epicycoids, Spird nfrdbis inVolutes
OF a circle parabolas, and the equlateral hyperDola
The fourth equation in which the radius OF curvature Is
included circle and its involutes, SDira ntrdbiIs,
catenary, and many other curves, new and old. ,,,
of Portland. The curve was defined by making the
radius OF curvature directly proportional 70 mo ord
nected by loops, slightly resembling one form OF the
| elastic curve.
| NOTE ON DIR. WILLIAM wATsON's CO-ORD1NATEs-
BY DIR. THOMAS HILL OF PORTLAND.
Dr. Watson OF the archaeological Institute, Boston, had
in 1859 presented TO this Association system Of CO.
ordlnates in a plane. represented in this
system by giving the length OF perpendicular let fall
from the origin upon the perpendicular 10 the curve in
terms Of the direction in which THE perpendicular lay
6s ina Of a cm Would be by
ting the perpendicular from the origin fall upon the tam
terms OF v He lad made partial solution Of six prob
lens in this system First, when p IL proportional TO
the nth power OF the sine OF times V, the equation
includes circles, epicycoids, paraboas and the inyo-
utes OF hypOcycOid; second, the special case OF the
cyclod was examined third the first equation limited,
was 10 polar cO0rdnates fourth the Sptrd
,airabs was touched up0n and nth, the inv0lutes OF
circle. The sixth problem was new curve, species
| of distorted cycloid.
| A NOTE on THE COMMON TOAD-BY DR.. THOMAS
HILL OF PORTLAND.
This paper consisted Of half dozen anecdotes OF in
stances of intelligence and dociity I'm the toad which
had come under Dr. HIPS observation, and which he
wished to put on record slight contribution toward
the comparative psychology OF batrachians The most
strikng aneedote that OF toad which had swal-
lowed one end of large earhworm, and had become so
larger Of losing the whole the crawling out of the
toads mouth faster than 1t could be swallowed The
ira stomach and the IN IL, held the worm in with
its foot taking fresh grip after every gup until the
lob was finished.
THE NEED OF UNIFORM POSITION FOR ANATOMICAL
FIGUREs--BY BURT @. WILDER.
The convenience OF uniform position for anatomical
nres is sufficiently evident to all and the neglect Of
sueh uniformity Of delay and even mlslnfor-
nation to beginners. The position with head to the left
ia partly because it is more natural in disco
zion and drawing partly the only author Prof.
agassiz whose figures uniformly placed, han many
years ago chosen that position
MUMMY MONSTER
DR. Chas. g. swazey OF New Bedford has kindly al
Lowed me TO bring some photographs Of Peruvian relics
and among them is OF human dicephalus. closely
resem bling specmen but as 1t Is In sitting pos
tnre and shown from 'front.' the existence OF medlan
nmbs s merely Inferred IL seems that monsters
Ala occur among the ancient Peruyans. aud that they
were not consigned to scientific Investigation, but duV
mummifed