New-York tribune., 1866-12-04
SCIENCE

Preparation c) Orggea.-A new process has been pat
enied IN France for obtaining supply OF oxygen gas from
eommon air by means OF highly oxygenated compounds
such as chroEses and bchromales manGanates and per
Hanganates which, deprived Of portion OF their 01y
gen by Of steam, have the power OF absorbing
oxygen again when exposed 20 current oi dyheded an
The Improvement consists in making the action cOnnu-
Gus by placing IN TetOTt Of the compounds ulen-
honed and passing into the reior cnrent OF sean'
bunent OF Oxygen is carried of and collected in gas
holder while the is condensed 70 water. W hen
bXygen has ceased be eliminated, current OF dry,
heated air Is forced into the reton The compound aD-
lOTbs portion of oxygen and IS again ready Tor the ac
Non Of steam Thus by the alternate action OF arr ana
steam the compound produces oxygen for an unm-
tied period. The process is said to work with great resu
lsnty and may yet be Of considerable Importance ID
b0etallurgy.
10 DeiCet Srlplarie Acid in Vinegar.-A German
Journal publishes neat process which may be thus
briefly stated Into the vinegar % be tested put small
uuantity Of starch boil the solution down TO half ITS on
ginal measure then drop into it very minute portion 9i
iodine If the vinegar is pure the usual blue tint VIII be
shown but If IL be adulteated with sulphuric acid
such eOloration will take place because the acnon Of
This acd upon starch converts IT INTO glucose or grape
= &Ysmote Process for Separating Sugar.--In France
sugar has been lately separated from beet moases by
Sppying the osmose principle. The membrane used Is
paper parchment Water is passed upward and In0asses
downward on opposite sides Of the membrane.
OzOHe.-Mr. G. PLASTE, IN note TO the Freneh Aca-
aemy states that City per ozone is produced in
the eeerolyss Of water when the poles Of lead than
when they are made Of platinum. He conjeetures the
increase is the result Of the secondary action OF layer OF
CarJoae or Pleaic Acd.-This compound, recently
found 10 efficient dsnfectant Is now USED Tor inter-
nal disiniecton, in the form of a lozenge
PhandtReH HEssE has discovered new alkalOld N me
red POPPY 10 is also found IN good opium. II Is soluble
1n water alcohol and ether and cysslzes from the last
Paraaar Tor Preserriag Neat-During the late meet
Ing of lie British Association Nottingham az one Of the
tores specimens Of meat preserved IN parathne were e4
hbited The process consists in the immersion Of fresh
heat IN psrafine temperature of 2iOo f. long enough
" effect concentration OF the juices OF the meat and 10
lxpel the air Aerward coating Of parafhne is aIphed
10 exclude the air and prevent decomposition.
Silica iA COrR-sfaiks.-M. Pierre IN a Memoir 10 the
French Academy of Sciences says some people have sup
posed that becomes laid because OF the weakness Ol
be stalk from the absepce OF silica but chemical analysis
BOes not show deficiency Of silica. Observing that
tOrn on poor land rarely laid, he concludes that the
stalks IN general give. way IL consequence OF an over
TTT Hardness II Sllper-M Nathey, assayer al Loca,
hos shown that .hC hardness OF which caryes ~ silver
lometimes complain not owing 20 the presence Of tn
ssd ar ary oicf metal but is solcly One 20 the nigh
lemuorsiaTe 80 Wboh The slFG is CASH KY letting the
sTncibe ocol .rll slight solid crust formed on ihc
turasc Cf tie fused metal, and casting AT hat moment
toft silver with q brilliant cut Is obtained
A Nfp Tot fer I0dHe-M. Carey Lea Of Philadel-
pha has successfully used chromates IN bringing about
The starch reaction in the presence Of iodine extremely
ANAL quantities. For instance, IN solution ~ lOddo OF
potassium so dilute that the addition OF nitric acid OF
starch produces percepube ELECT by the further ad.
aifon Of tiaRie droD of a dilute solution Of the BIZ
thromaie Of potash, instantly produces the well known
EhAnee Of color
NpCCf0Ciff.--h
rated TO the French Academy of Sciences the fact that the
son may be rewed through lens covered with silver
eaf; the suns disc shOrn OF IT'S beams can thns DO
,eaTv seen Subsequently NJ Mescius made useful ap
sIcaton Of Foucault's discovery. Having been injured
While making an experiment in the laboratory bis eyes
we're painfully affected by light In TINS eoheiton he had
cone 10 Sectacles with black glasses, such used
by engine drivers these be put green glasses which
answered pretty well; but further experiment be ionnd
be best meod TO use pale blue gosgea win
yer or gold hm and these be recommends 10 oil persons
1oubled with weak ewes.