t amount.. The mile in length is certainly unique and interesting. proportions as a distinct business. The machinery feathering of the floats is automatic, and is.regulated Owing to the depth of the grade lines of the sewer be- and appliances for driving and fastening the corks by the level of the… … joins the circular one. The general method of prosecuting the tunnel por- HAYWARD’S IMPROVED CORK ATTACHMENT. tion of the sewer has been to sink shafts at about every 700 or 800 feet, and then drive the headings each ble degree of perfection. But the reverse process, that way. Fig. 1 represents the…
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