¿A PUIT«4 | Y Ih Mrd°, E TOES Ï| | A DESCRIPTION OF be E E E | ROBERT WELDOVN's I| | e NTT E NAT YZ | HYDROSTATICK or CAISSON-LOCK, 1% || Which is now building and nearly completed Le"E On the SOMERSET CoaAaL-CANAL near CoomB-HAY» ES|| ABOUT THREE MILES FROM BATH« ZN ME= | | S many impediments ariſe in the progreſs of Canals; ° First, From a want of water to ſupply locks in dry | ſeaſons and elevated ſituations. | 71 |»dly. In croſſing valleys by expenſive aquedudts 1° 2dly. Tunneling through hills and high grounds 5 | And 4thly,‘The great delay occaſioned by paſſing many locks where the unevenneſs of the country renders it unfa- 2 vourable for canals; R. WELDoN, after having devoted many years ſtudy and : indefatigable labour to avoid theſe difficulties, and to accom- A pliſh this great obje, now offers to the publick a deſcription i of his Hydroftatick or Caiſſon Lock. gi The drawing annexed preſents 2 perſpelive view of the : machine or contrivancé by which the conveyance is to be 777) E Z 2> ES Sete effeited, and of the inſide of a lock, or pound, in which 1f gua is immerſed. A. conſiits of a trunk or caiflon made of wood, and of dimenſions equal to the reception of a commercial veſſel of twenty EEE—— au u GE DCE Ug E 2E