New-York tribune., 1868-04-29
SCIENCE.

CATTLE DIsEAsE.-In France cattle feeding
on grasses have been attacked by ssu,r
which commences by rapid swelling ana terminates py
the suffocaon OF the ANIMAL The gas which produces
the swelling has been anayzed oy a. liz; M anu sT', t
alkaes would be the proper remedai agents III such
C,ppoNrz.TroN OF Woop.-M. Gillot, in his
memoir TO the French Academy Of Sciences this sub
feet SAYS tie only condition essential for the production
Of good charcoal Is that the operation shall proceed
slowly. The decomposition Of wood commences at about
the boiling point OF water. During the decomposition
heat in the rtort greater than that outside OF IT, when
the heat applied approaches SOO' G. Too rapid an IN
and gaseous products diminishing III corresponding
degree the useful accessory products, as well ~ the yed
proportion Of aeetc acd about IS cenp when the
Temperature Of the oven is 2o' C. In this way given
amount OF wood Will yield about twOtrds us weight Vi
charcoal aud or per cent eetic acld.
BEET JUICE FERMENTATION.-ln the process
OF making sugar from bees the production of Nitrous gas
during the fermentation of the accharne juice always
serious annoyance. has usually been preyented ny ~,
treatment with suphuric acid NJ keiset az ia
formation OF nitrous gs to the o1iIauon I % oid
when this akah is not saturled with pUWerIu u,H'
He Keeps careful account OF me amount oi ,d cr
present and regulates the use OF s4lpnlc 80 ~ t I,
fDgly This plan as been used WIN success I t , ~
three years in one sugar U On @ smoct
n schlpsng takes the position tht de peSvST tisps ~
Uuon plfrates The neutral alkaline state, he thkS
rs particularly favorable TO the production oi
matters aud the fact that the addition OF suphWC %
,revens fe formation Of gas regarded by MN
as a confirmation OF this VleW'
AIR VUIATED BY STOvEs.-Ihe experiments
Of Deve and TroOs Of France having proved that NY
droren carbonio oxide, and carbonic acd gases VIII
actually permeatc and pass through castirOn plates GER
tsn foreign Journals have published the unNMrantabe
conclusion that caSOn stoves are unhealthy ana nave
gone SO far ascribe the epdemics which have pre-
vailed parts Of Savoy 10 the use or such stoves
II the disease found only where these heaters are used
II would be more reasonable To infer that arises nom
want of proper ventilation OF small rooms The gaseous
products of combustion viii not pass through iron wneh
they have an easy exit by Of chimney In thls
country the experiment OF breathing the products OF
combustion is being carried on largely by the inroduc
zion OF apparatus cooking aud warming by means OF
petroleuI aud common Illuminating gas. They are NOT
psnay provided with pipe tor carrying into chimney
the gaseous compounds resulting from the genera
tion of heat, winch chiefly water VapOr and ear
bOnic acid. with. perhaps traces Of caIbOnlc OXIDE
very poisonous compound. Thousands OF these poIta
bic heaters are nOwused. but with what detrlheital
effects We are prepared 10 say for the same OOec
ten made 10 will apply with equal iorce Othe
OF gas for Illuminating purposes II te oon nedtSu
by such u stove is large, contains an open fireplace cor
,,eed with chimney and has fun supply Of doors aud
windows no unpleasant effects may be felt by It's Occu
pants but the must be the result in the absence
Of sufficient means Of ventilation. Rooms winch are re-
r,hcd 10 be brjlaptIy illuminated in the evening when
hed with people give evidence o the yating elects
sf lungs and gas burners. For the purpose OF more per
feet ventilation, many churches, theaters ana pubhc
halls been recently bghted by rows OF burners near
the highest part of the ceiling and 20 arranged tlh te
gaseous products before being cooled carried b the
lcvity into shafts from which they have aTapu eA