...H CHATLEY; G COUTTS; A R B EDGECOMBE; D W LOW; J MITCHELL; E W PARR; W SMITH © Thomas Telford and ICE 1945 DREDGING MACHINERY DRAG SUCTION DREDGERS DIPPERS BUCKETS SHIPS HARBOURS PORTS PLANT HOPPERS 456 CORRESPONDENCEONDREDGING MACHINERY. 'CORRESPONDENCE ON PAPERS...

... into the steam navvy and the dipper dredger which, in its most advanced form, is in use on the PanamaCanal for dealing with land-slides in theCulebra Cut, where enormous quantities of debris and rock boulders up to 50 tons in weight are stated to have been removed by the buckets of the dipper. The Shadoof...