New-York tribune., 1875-01-13

!.
various conductivity, be trsyersed by the curren.
the speed of the conveyance OF the liquid into this
hodv rapidlv dimipishes and soon becomes zero |
u under the same circumstances, the currens IL re-
versed after short interval the liquid enters ano"
from the now positive electrode. By reqsenty E
peatinQ this reversal large qoanutle%s sol Oh .ae hgsu
can be introduced, Mr. Munk has IN TINS way trsns-
sc.ssd fatal quantities of strychnine solv'ion
,hronah the unbroken skin OF young degs. and has
introduced chinin aud odiee 9i potasnm inao
In the excreta The essential points thsreIore, a
such operations are that the liquid snbstsnce Of Oe
placed at both electrodes, and that Che alreotoh vi
the current be frequently reversed
CAPrpREos INSECTS BY " "FLY-CATCHNa' PLANTS.
Much attention has lately been attracted 10 tno
so-caed fly-catchng plants, and the opjeot Oh inc
various provisions by which the capture OF insects
is rendered possible, whether as In the venus ny
tran tionao muscipula) by the bringing together OF
two lx,oinn of a leaf, with row of spines around
the margin or by attracting them into cupshaped
receptacle as in Nepenhes and Soaoeaid, or by the
presence Of organs secretiug viscid juice as IN
D,oard or Sun Dew, which holds an insect whenever
IL aliehts upon the surface Prof Bailey OF frovl-
depoe has lately called attention 10 siian ;o or
Sn oI the Which has ITS corolla covered
with innumerable cammy and gianduious If. naas,
I'm the bud these hairs appear 10 cover ,io mnoao a
Surface of the flower. but when tho coroa EXPANDS
they seem to occupy the mdrb OF the pc as weil
the tube Of the eoroa thess fbe,r nrccise
object or the method of application, Pror BAILEY ID
st present unable TO indicate .
REPLEcTING POWER OF THE PLANET MERCURY
ZSIIner has extended to the planet Mercury series
Of photornetric observations similar to those made
by him some years ago upon the mOon The obser-
yatiops made. upon two especially favorable even
ings gave him. for the relative brightness OF Jupiter
and Mercury the ratio 81 in one case and S2 In the
other A comparison of the pecuartles OF the re-
suits for Mercury and the moon, leads him 10 the
conclusion that Mercury is planet whose super
fetal condition very nearly agrees with that OF the
moon that, also like the moon. it probably pos
sesses no atmosphere The rejecting power OF albedo
al Mercury is the least of all the planets and even
| less than that of the moon. Zollner also makes q
very ingenious attempt to determine the albedo OF
the earth ana @ tiH Ia Jaw Oh fe bV i in it's Vaous
phases, from distant planet concerning MS
attempt to determine this albedo through observa-
tiops of the dark limb of the moon he states tnat
| although the results scarcely be accepted as
having much accuracy, they nevertheless show fhe
| practicability of the method
| Production OF PATINA OF DIFFERENT C0LoRs
ON BRoNzE.-The attention of Christophle and
| Bouilhet has been specially devoted for several
years to the difference in the color of bronzes and
| the method of reproducing them Their inSestlga-
| tions we're controlled by the conclusion reached
| after numerous experiments that the patina OF
bronze can only be permanent when il results from
natural chemical reactions and is not developed by
varp,sh or corroding agents. As a result they eX-
| hibited brown, red, Orange-yellow, and black
colors. They state that they were obtained upon
the surface by reactions which the production
| of suboxide of copper in two molecular m0dnca-
| tions and also of supbide of copper The OBJECTS
| allow of a coating of varnsh for protection, the
chief condition of It's successful application being
the slowness with which 1t is done. The process ~
is claimed, is practical and trust worthy ana IL VIII
reproduce the same three colors at any time. AddI
tiop of lead the alloy not necessary to produce
the black patina, which under such circumstances
has been found 10 be brittle and wanting III perma-
! nence.
The CErL-srRUcrURE OF ORGANIC TISSUES
Prof Redfern, at the late meeting of the British
Association called attention to the changes that
have taken place in the views of scientific
men in regard to the cell-structure of organic
tissues since the days of Schleiden and Schwann.
At that time the separation of groups OF cells by
basement membrane was considered to be an I'M
portant physiological condition; such groups re-
tanning individuality carry on their life, and even
pass into such diseased conditions cancer without
influencing OF being influenced by neighborlng
structures Now. all is changed, and the idea OF
cell as q vesicle has given place to that Of
solid corpusce. Graham has tanght that all the
tissues are permeable. and continually permeated
by fluids carrying nutrient material; and we more
lately learn that the living corpusces wander
out Of their positions of attachment enter the blood
current. and agaiu pass from the blood vessel
through its soft and viscid wall There indeed seems
to be evidence that the finest filaments of nerves
end in the living corpuscles or cells. especially IN
the olfactory aud gustatOry cells, and the skins OF
fishes. According to Prof. Redtern. the statement
of PGger that the nerves terminate in the cells OF
the salivary and pancreatc glands although prob
| able has not yet been positively established.
THE GASES OF THE BLooD.-In paper by Matthew
g d sVs cd
that repeated blood-lettings dogs caused an in
creased diminution of the percentage OF oxygen
contained in the arterial blood and exercised but
little influence upon the nitrogen and the carbOnic
acid In the of these experiments they ascer-
tanned that there was onehalf per cent Of hydrogen.
III Yenous blood, but none in areral. Outside heat
was found 10 have great influence upon the oxygen
of the arteria, blood its amount being much dinin-
ished after exposure to high external temperature.
although the number of respirati0ns per minute is
raised thereby. 1t would seem that increasing ten-
perature decreases the endosmotic interchange of
gases through the pulmonary mucus which has
greater influence IN determining the amount OF
oxygen in arteral blood than the opposing fact of
increased respiration. The lowering of the tempera
ture was accompanied by an augmentation OF car
bonic aeid, The amount OF oxygen was dependent
upon the activity of respiration, the increase of
bodily Temperature being at first followed by de-
crease aud soon after it an increase Of carbonc acid
IN the venous blood. Oxygenation takes place in
the caplaries and not in the larger vessels.
In death from cold there is decrease in the con-
sumption of oxygen and but little difference in the
composition of the arterial aud yenous blood. In
death from heat there is however an enormous oon-
blood contains but little of the gas. The muscles
become very acid which is the of their speedy
and pronounced post-mortem ngdity.
NVw puosppOR- -RRONzEs DR. Kunzel whosev