The times. [volume] (Richmond, Va.) 1890-1903, 1902-04-27

and Levy.
Mr.. BoLLlNG's ESTIMATE OF THE COST
Many Experiments OF Great Interest Have Been Made
Recommendations Upon Which the City Council
Will Base its Action in the Matter.
- - 4

propriatiag 900 for the purchase " =
Ute for a settling basin. This acton, SO
sar as the Board OF Aldermen IS con.
eerned, commits tho city 10 THIS scne a
OF securing clear water.
The whole matter will come up Tor ols-
& n,ssfcn In the Common Council, Whfcn
meets In a few days.
In this connection the full and hitherto
nnnpbltshed reports of superintendent
Boiling and Experts Mallet and Levy
are OF especial interest ana .aine.
EXPERIMENTS MADE.
Nr. Boiling makes the following inter
4 el,finr rerorts Of experiments made upon
5 ar,,e.s river water by Drs. Mallet, Levy
and himself:
q First Experiment. One compartment OF
+ the new reservoir was filled with muddy
water in August last and allowed 10 s.a SUN
for i3lrea weeks. The wafer vas csi q
;,r examined at different depths by DTS.
a.allet and Levy Throughout this pe7oa.
And Ii daily improved. chemically. bacter-
6n,orica,Iy and in color, and estaplsheu
aS.,e fact that the water was improved os
3 being allowed to settle in a basin as deep
as the overwhelmingly. twenty iee.
..For the whole period Of twenty oass
the percentage reduction In the 1iao1As
of suspended solids was
A. a depth OF feet, es per cent.
Al q. depth of 10 feet. So per cent
AT depf,, CT 20 feet. 20 per cent.
..rrh.re is mr. .nical evidence that the
r,eter- thus i, ..ailw clarified, has under
gone any Ct Iteration in respect 10 40
.p,l,ol esorieis.,,s or fitness Tor oro,na1! VS.
and hence. when, or the bth OF 0ep,s.-
her. aIr. Boiling wrote to me. ASKING
3 -u.hether there seemed to be any reason
1or running off into the river the con-
FONTS OF the reservoir compartment winch
.,a, tl,us remained stored for the per1od
~ experiment. or whether the stored va
Scr might not perfectly well be FED Q ,n ..
CITY mains. unllesitatlngiy RECOMMEND.
that the latter course pc taRet'' a -. 49,
Recommendation was s acleo ti'n 49,
1o;.r days later.
4 = second observation-disclosures experiment
49, i test or trial for clearing the VA
1er by sand filtration, commonly callsu
aa5, 10 lsnclish system. A send bed Was
-cnstrncted In one of the old canal iochs
near the rIyap-house, upon the usuai '5. -
shods for sand filters. Wafer was . ..'-Is,
4 m the bed September I'D. and taitoWeo
Ia mss through for about six weeks pc
s,re tests were made. After some weeks
s n Was clearly shown that James rlIer
x.atcr could not, in muddy state' oo
rIeayea l,y this process, and the iornna-
tion OF fine mud ON the SURFACE oh e sas
sand and the penetration OF lhe
clay into the sand bed. Teduceo guy
.,rg5s,tration to 1854 gallons per acre PEI
amounting To only about eight PEI
,e,,t, of what is usually obtained from
this system: besides the effluent was n.y.
i clear The cost Of construction oA e suIn
,tsTlant as would lie necessary LOT 49, aIen,
n1ond was great. as was also eiie u.s. .''-s
maintenance. 49,, xrar
...Third Experiment. ms La .,haS
made Mt the Jewell filters OF the A l''t,
,,,a,,e Paper Manufacturing COMPANY.
sbesa are mechanical filters. where t',e
,i., 4. Goa culated by the use OF alum ~
ts,,l,. ,nd the decanted water passed ~
M alters. During one time OF the trla,
Nc in1laent water vas very 1nuo o,l CIV
Il required about Is grains OF aluill pS,
rallon: when the raw water Was ~.
( ,,.,,,ly turbid only BIO of grain was ne
p ~. 49, Two water was filtered rapidly
nd economically, and the effluent Was
s,,.,rrbt and clear and from the report y,
nar NIallet was found to be gooa III q.
.ar,,acts and from that of DR.. Levy t t.'
i -,,.sr. ninety per cent. of the bacteria We =
Il removed. ,,,e,o made
..I.astIs.-A number OF tests Neie 1ua ,,..
4 ~, 5Dr. Mallct Ter clearing tho water 70, ~
& s. ~ ~ other chemical agents tna..
3.,,,,ra resulting in his successful use "
s.a,, '.s,s ferric sulphate, ferric o hioIiuo
. :. which produced rapid coasuli wa
I !. 49,, and 4he decanted water was Dill
aiantly clear and good. s4
MR.. BOLLING'S CONCL l-, Ne,
5 -.,rhe conclusions OF tnese s ea..SA.ss
.x.,rn. mat our drinking water is gooo ana
s'.seie so,,,es though very forbidding IN APP
sn,..,,ce when muddy. That ms CO =
!1.t,.,,.,t,nn az a large sedimentary basih IS
,,,a.,,eouisite to everything else ara 10 :.
{ sl,s aina of what ought to be dcne, ao
,,at4er what further pans may pe huop.-
ed and carried out. That tae ste 70. az )
~ Of such . basin are that 1t
& .syn,ds the means of furnishing the city
.,.it,,s clesr water OF nearly at all uHcs,
a-,,s M no time objectionable in coiorsor
rantiition That 1t will be SO ioca!eo ti.sAs
i Al chances FOR local contamination Wal
Ia cut off. which is perhaps 1le ohis
ss.ne,,.,ce To our water for many years 10
u ..,,.eI and that the experiments made
lii, The water this summer clearly dem
Sr.+,-s IA zig Improvement by SUCH stoTasS.
Further. if it should be the pleasure OF
me Council to proceed With all the = NJ
movements necessary to insure OIL
1iantiy clear water at an s .nS =. s .,,e
construction of large SECONDARY paslns
.,ear the pufnp-.louse, where the coagu-
la,..s could be admitted and the water Go
canted to the pumps, or The construction
81 . secondary basin and filter tanks or
ftltcring the water. would certain en-
sure the city a clear sooo. anu po.<L9 s,s
water. The estimates in full Tor each
s. ~ the atoya-named Improvements ace att
& N, conclusion, ] bog to say that 1T IS
gratifying TO me that the recommenda-
1fons have made for many years as 70
yhe means OF Furnishing the city " tn
rood and clear water are fully endorsed
and approved by Drs. Mallet and Levy.
who have shown the greatest interest
and care in conducting these experiments
and making recomm endations for the I'M
nroyement of the water .
80 ESTIMATES OF COST.
The Following IS Mr. Bolling's estimate
q the cost OF the scheme proposed:
The settling basin or first step alone
WIN cost
! Gedimentation basin
capacity c0o.0oe.0oo :.
gallons e. z',oVV. W
@--
Annual expense
ANNUAL MEETING
General Assembly of the Presbyterian
Church. Jackson. Miss, May