ly assisted by the series of short tubes, K, and maintenance. This he effected by means of a new upper face to receive a strap which is stitched thereto. which connect the tiers of headers and side pipes to- arrangement of the parts. Mr. Colman’s boiler, as in- The ends of the strap are passed… … orifice of one of the deck carried. It will be observed that neither sewing nor riveting is necessary in applying the device, and that caissons, having a head of both time and expense are saved thereby. water over it of 12 feet to
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