The free citizen. (Orangeburg, S.C.) 1874-1876, 1875-10-09

in the causition ofdiscasc, than any which
we possess ut present.
| NENTILATIoN.--Ev Ever since ventilation
WAS first talked and written about, it has
been Il more or less obscure and uncertain
subject; Il subject on which it was easier
To Show what ought to be than what could
he We have, therefore, the more salts
fiction in calling attention 10 paper hv
Dr. Francois dc Chaumont. OF the Army
Medical School, Nrtlcy, which lays down
definite principles ofvrntilation, and will
enable any obScrvant person to decide
whether Il building is properly ventilated
or not. The paper in question: son the
theory of ventilation: an attempt 70 cs-
tabliSh Il positive basis for the calculation
of the amount of fresh air required for an
inhabited air-Spacc'- read III Il meet
ing nt the Royal society. and has been
published III their proceedings and is thus
available to all who desire to make use of
it.
The basis taken by Dr. Francois dc
ChaumOnt is "thc evidence of the senses, =
but with proper care and precautions
he poison III impure air, he remarks. is
organic matter, either suspended or in the
form OF vapor; and it is this poison which
imlGlrtS To air that diSagrcc:blc duality
| commonly described as CLOSE This
| cloScnc>S can be rcmcdicd only by dilu-
ting the confined air with Il quantity of
fresh air. and to determine this quantity
! isoncotthc steps ina theory ventilation.
alton. Observation shows hat thcamount
Of organic impuritv bears Il fairly rcgll-
lar proportion to the amount Of carhonic
acid developed by the inhabitants in an
;lir-Spacr This being accepted. and zen
rril diffusion being admitted. we can cas-
| lly calculate the amount OF fresh air re
pulrcd IL bring down the cirbonic acid to
some fixed standard. If. now" continues
the doctor. 'wc adopt aSour standard the
point ut which there is no sensible differ
cncc between the air of IN inhabited space
and the external air, and agree that this
shall he determined by the effects on tn,
: SENSE OF smell, our next step is to aSccr.
: lalh from experiment what is the avcra@,
, amount of carhonic acid in such an air
), spacc from which we can then calculat,
G lhe amount of air required to keep il i,
+ that condition. But aS the sense of smell
y Is very quick ly dullcd, each ar-spacc /,
II ne examined "ught to he entered ,lircctl,
:; from the open air"
|, liy observations i'll hospitals and bar
Il racks IN different parts OF the country
Il III. L l'lilcoiS Nc NllaunOllt has arrived a
II conclusions. and obtained data ON whic
Y to base his theory. Under the sever;
h heads: Fresh -i:ir--not cloSc-closc-
very closc-cNtrcmclv close, he record
. his observations in a way which will cl
able any one interested in the subject /
test them for himself The condition
f. land down in the paper rs ''thc standar
Il OF good ventilation are, that The temper
u aturc should never he very much bcIo,
q sixty degrees Naror ought not to cxccc
J. - grains per cuhit foot, at ii tcmpcratur
IS OF siN1y-thrcr degrees, or 80 grains at
g temperature of siXty-tivc dc"rccs-IIl
is mldity(pcr cent? ought not to exceed Sc,
| cnty-thrcc to scvcnty-fivc--Car Carhonic:c,
* respiratory implrity ought not to cxccc
If o.uOo2 per foot, or 0'2OoO per thou<an
l. volumes. Another point established b
4 this inquiry is that where disease prt
" walls, more fresh air is required than i
# health; hence, hospitals demand more pur
f air than harrackS.-C Chambers Jou,nnl.