The New Orleans daily Democrat. [volume] (New Orleans, La.) 1877-1880, 1880-03-07

tains the sugar IL driven OF by evaporation al
ID d dry state ana can Be- weighed. II any
| other organic matter 70 present In a water. that
organic matter can likewise baubtained In q
evolving = peculiar and we'll -koown odor: and
auy other matter. organic 10 its nature. ba
eanlo substances blecken. when Hntjscted TO a
enough 70 destroy them
exiet III water but II y not my object q discuss
s. h eys t. n hoS s ets
the more strongly to impress on you that a
| clear water ~ not necessarily y pure one.
Sanitary chemistry cannot express the
ORGANIC 1MPUR1Tr IN WATER
Ia absolute weight. as beinR no many grains
| per gallon: but y can express very satisfaeto'
,ss sss whsb L Hs o /, ,ss
tsrmlned BY The chemical process, ! >, 10. ~
reaivs W. scale S he eharacter q a. ~
water can be indicated, promising that when
the lmpurity figure ia under 10 the water Il
to 20 Il IL. leea satisfactory ia character. and
whssn biaher than 10 II should be condemned az
III placing the condemnation figure at 40 a
latitude is given 70 the organic imUnrity which
y no! allowed BY English sanitalians: They
conceive water 70 bs dangerous when me In
with we'll waters. where the Contamination is
sewerage Or animal matter while hers thu CON
Examination 's more 81 q vegetable nature, Wsre
your water supply from wells l should. ike
servaticne on rain water. carried on for severa!
that while the naure q impuritv remains be-.
low 40 no evil effects follow the use Of the water
but when It exceede that lumber remitten
fevsrs are prevalent. INCREASING In severity and
number. as the figure, Of impurity riuss. and
diminishing as 1t falls. The connection be
tween
THE REMIrrHNT FEVER AND THE VEGETABLE I'M
PURITY
In the winter can bs studied In the mountain
region to better advantage than In lower lande
Or warmer latltu1es for theirs are no local
aonrces OF malaria to which the fevers can be
YOU can throw the blame on your swamps md
70 on drinking poison from your csterns. The
statistical mac gu tho wall ~ this room shows
larial fever. during the past ynar, 30 many
deaths iDuly vast amount Gf sickness aud
suffering Ia tho cases wh!ch oeourrei but ~
not die. Nor must W. forget the diarrhR i
cases. How much had Impure water to do with
the production ri the wave Of disease which In
represented on the map for tho past year by
U TO this time have placed on my record
tho
ANALYSES Or 80 orsrERN WATERS.
Most Of them. 40 far NJ ! can ascertain. rep
resent eisterns OF good repute., few are old.
II IL true. md have not baau cleaned IN many
yesre. but To Offset them Others are compare
lively new, have been cleaned recently or arc
preserved from foullnR by the ase OF q cutoff.
In fact. fourteen Of the waters are from pub
lio or .aemi-public buildings. aud ak from pri-
vate dwellings,. where an endeavor 10 made to
insure purity There na ars thns twe n' which
brought TO me mainly for the sake Of Establish.
Ing their purity, while nineteen samples were
collected hy the inspectors to represent the
nlOtaOt9 Of thR average nElvRtn HtNtaCD.
or these 30 waters the i'm purity figure reaches
10 In nine specimens. runs from 10 to 10 In
remaining eight waters. Of the doubtful or
suspicious waters which rat Ee from 10 to 90 the
ys.n into xsoa ana Sab h Ssn
wster ~ na he@ you'd s1 nre~@ 70
each side. making 40 good and 10 bad out Of
the 49,
The recurrence Of the figures 40 and 10 IL liable
10 cause Misrepresentation. X is simply AGO
n pesa n nnn, u .1 !, nv ao as
that the " collected BY the Inspectors were wi
bad Among the latter was some of the purest
But these results are
ny No MEANS SATISFACTORY.
although a knowledge OF all the circumstances
connected with the cletern water question pre-
pares us for their occurrence. Tue fact is the
fault does not lie entirely with the cisternH.
foul cistern will give An impure water. az we
have nlerady seen, but clean ctstarn. will not
give pure water unless pure water is stored
In II. or unless the water uDdergoeE nurtfca-
ton during the period OF its storage. Now. the
rain water which Is run into the cis.erns is not
Tae Ia 90 mot that oa%
aeen to b. washed from the roof. That IL I'M
derstood WHAT would desire you 10 appre-
e that IN rs ha water y 70 wa fa
Ing from the clouds. This IL .:...5
No SENSATIONAL STATEMENT.
based on theoretical notions. n 10 q serious
fact which little reflection will enable you to
ins dust, minaia PARTICLES which are carried np
by tho winds. You can see them dancing In the
sunheam az II croasae tho room, NY colleague.
ala and organisms and debris of both which
pervade the atmosphere. He Is here investi
sahp,s that VERY snn9e ana organic would
iect around US end stiilesns ia its turbidity but
for the ruin. Your city has no mountains IN
where hazy aud uncertain In outline after six
weeks OF hot and dry weather. Again. you
have seen them on the. morning after heavy
washed the tuIhidty from the air--to use the
customary expression. 1t had purified the at
mosphere. But, II the atmosphere has been
Manifestly It jig to be found In the rain water.
One OF the objects Of your association. I'M
derstand. Is to procure a water-supply to flush
the streets and cleanse them from MI sewage
Rccu tn ulRI ions. Nature raises water by evapo
ration. condsnses It into cloud and precipi-
tnteS 1t ~ rain 10 HuSn tue atmosphere ana
cleanse It from all of Its impurities.
RAIN WATER Is ATMOSPHERIC SEWAGE.
One Of the processes by which the chemist
collects the impurity IN the air In order to in
vestigate Y is By spraying . given volume of
air and examining this artificial rain.
But. while granting all this It may be objected
that practically the lmuurily Is Of no moment.
Here chemical analysis steps In to show that.
while the impurity Ia rain water collected In
clean dishes varies with atmospheric condi-
tons, Its figure is frequently such as to con-
denim the water have watched over the rain
fall for the past six years In the Rocky noun
tatns. on the coast Of Maine and In Tennesses
and Mississippi. I have not been able to secure
= sample Of the Nav, Orleans product as yet.
the city. The impnrity is high To- the water COL
lscted during the first part Of shower. usually
latter part Of the fall. In this more than In the
rejection OF the roof washings., consists, the.
value Of the cut of AT the end Of several days
continuous fall the rain is at its purest. Its fig
ure OF tmpurity droppng within the limits Of
lowest figure which have obtained.
Since rain water is thus impure. 1t may sound
rathar QuomQlpNS n record that nj ha