Chicago Tunnel

TIiíh tunnel ia to burrow under tho laks two m'lcs, out to where the water ia decp, cloir and o al iu uil we;ithers. There i. u va-t strueture of wood and ;'O", weihted vi b. stom.', nad with three tiers of floodgiiles to let iu tho water, is to be put down to meet tlv: tunnul ; and iu this wny the oity 8 to be Biipplitnl with pure water whcn tbt werk dona. So (ar, the vrork ia ofltiruly succeí'sfiil. Six hundred feet of tljo tunnel are completed. It is driven tbrough a vast bed of strong, compact tiHie clay, thro'.igh wbich not one drop of water has come, though tliey Blruck fire onoo (ind eains near being burnt up, The oly i cut witli á too! iiko a carpentër'n adz'., und the arcb - tvro brisk Uiick, and each bric-k inspected three tune - in then luid as the clay is cut oot. Ttio digging hs brought out sonie carious hiols of oíd times-; as, for inptance, great rollcd bouldurs aro fouud buried umier sixty five feet of clay, and atonas with tho uumistakable glaoier groove u tbem at tho Ramo deptl), aodRtouea of wbicli no other speoimuua hve ben found between tho Allehanies and the Rocky Mountains; and iron pyrite with á goidy f.-isüination aboutthem, and gyp-:ura, and ouiious hints of all eorta, &r ihose that lovo to read " gennons in atuues."