, 1865-07-25

sstlou, two mTics nom shore. In tho middle Of the
anchors put doWn ee.ersl DAYS before, aud Nho:e
ard The tnes preparing to return 70 The city. A.
One could NOT nnt observe tho purity of the
he laet 6as ID shore It was tnrbtd IL consequence
Of The bad weather. 1t WIS there ttansIucent per-
feeuy clear and pure- The position ID uudoubt.
ieeied Water taE,n @ oa % has point @ hss ss nsver S
shown more than eight grains Of sold n1atter to
the gallon: Il Is far away enough from shore to
current In the lake carrier away ii ths dlth emp
tied into Airhiimfchsgan> round the bead. and
down sgain On The eaeteln ahore. II nothtnx
10 Srn Sar ne dn!has ansn to
cured an tnezhta-tttle tnpply Q! the purest watsz
or the copttnentor In the world.
TT oh, I'D e The party ~
her ee1ew entanR1ea il one Of the buoJ.. and was
rnshle to get clear till bne. Vas procured nrou
IT. e 70 ta
ttdn inst no ace1deIt, Involving pe1sonai 1ojury,
has occurred since the commencement Of the
Tbs CHI. On irri,Irg 1t her de,tIuation, was
mstc for thst p9spoee. md when the party le:t
h:r she Tas sl9wly settling down to.aEa the bed
ahont ripe'een 7eet. II iii taae aboat $ 80 % tons
ot stone taled u tas bn!khsad. - marked in tte
c1sersm) 70 sink Ter to tho bottom, which
aecu1ately pltced In the required potlho1, BY
as, 70 81 ss sons asa as s51 1nr w hsa
TIA weIpht Of 3'900 TINS tor steadYtnG against
the waves. The crib a. now built Will stand
ee M s. T
gives MAXIMUM asea OF 900 teet which can be
exposed II one sweep to the action OF the waves,
tb net In
stances be lcis tran thrte and half tons of weight
10 each square foot exposed to the action Of shs
waves; The crib Is now kept In place b. aye
ene having i tcrev Ct 1hlris in:hes acFosl,
thirty two inehes IN 1eogth. 4 hold on Tho
clay Of ten feet. apd 3 Tsignt Of 6oo pounds.
mics IRON !hoEe In direction perpendicular 10
the ebore line. shout two points to the north Of
sne east from the thore end Of ths tunnsl At Il The
excavation vii BE- commenced At the lska end
shout ,he middle Of September. when ths work
~ from soh a snds ,na sn9 b.
Exactly Gnethird Of the whole length Ia x1resdY
dhtsbed. The preliminary to The lske eBd *.
s.vs.inr. lsno he nxing ot The Iron cylinder
tsl depth Of Et1ty-four fees from the surface Of
the watez. The, cylinder. nine feet ia diameter:
sud aa sad hsf T. we r. as 1a M
chi through The soil. and the jo,nts be,ng. ms6e
, sas ,sa a d a. a1Ss; g .fa fs s1H.S &
four or I've Will be but 1ttde; the bed Of the lake
III % tehs plste, IN whcs Vii vii BE- pIaeea IN sir
pump: The air and water being exhausted. the
tupet!nccnbent pressure Of the atmosphere will
columr down through the earth without digging,
and with this sdvantaee. that the nanges at the
joints beng Internal the outer tnrface Will be
aae seht1y eonesi ,hs lover @ end a he sniiess is
tht cylinder will 6t the soil like wedge and
allow not dzop water 10 reach the base from ,ne
= he
qnired ceptb, the aff Wll be let tn the top taken
Of, smother section put Or, ,she pueum.tte proress
before. 4 covered pl.tforn. of house, bulit over
the who'e viii enah1e the workuaeu TO proseeu'e
the work uninter5upted bI ra,n o. W,nd, and IN
mcneed. the earth brought mp being carried away
BY eeows who're return car4oes will be bricks for
tie lining Of the tunne!. Tho bore completed, the
70 keep out floating logt, nsb. Sc. A eiuies made
IN the. s.de Of the etlb w,ll BE- opened 70 les
let Ia the ~stez, and a lighthouse viii be built
&c s' e4iS i iem perT 9s yeeess I'd & show
ing ths way to The harboT Of Chicago.
i ws. originally Intended to pnt doxa tKo or
mel, hut 1t wse found t, be unnecessary. One at
The farther end is all that ID 1eeded. The fuunsl
sa ' a. ess
The liz ing IL Ct brick. fully csmnoted. Tbs b1re
slopes towards thA shore. IT the Eato Of two feet
per NIEt H0jCu VII Gu3Q49 ku1 HQ8Alltu ~
empty the ruppel thond repairs be necessary.
Many doubts have been expressed that the I'M
Neree pressure Of wateE Will force out tho brick
need to lear this the bricks tra set into the aoltd
clay. which ia hard - the rock itscff, au1 can
never g,ye way while the water above preeaes
duwu upon II, With 4 pressure exactly equal to
Inst sxeSted 1pstde the tunnel.
Tba conifsetofs aFt Ms+sr>. Dali j. GowAn. Of
rho amount pald will vary somewhat from theae
figures, how much We canno. say.
The tunnel ittelf viii be, when completed, one
Of tha wonders Of the world, worthy Of taking lts
plaza as The eighth. wa helievs that such work
his Eevef before been undertaken. Aqueducts
hsye ere row been carried acrota valleys, and c..
n.l. have been driven thronkh mountains, but
not On the slr tight principle: 1t remains fur
Chicago. herself i wonder Of the world. to sdow
to its civilized portion how waser tight canal
can be formed under tho bed OF mighty lake.
running ont 10 dlatsnca OF TWO miles towards the
r1eing sun. II Ia an advance etep In tue march of
progress, whose twin and complement ia The
great ohseryatory--the one is IN exploration Of
The earth neyet before attempted, the other will
enable us to penetrate mosc deeply into the lud-
Itties Of tp9ce thAn hiss ever yet been a:hieyed
By the most scientific peoples ths world. Chi.
caeo Is gong abesd, and her every effort IL gt-
ganuc stride towards perfection.