...SIR M I BRUNEL © Thomas Telford and ICE 1843 TUNNELS POLING BOARDS SHIELDS TUNNELLING SEEPAGE METHODS THAMES UK 5th. A set of three-throw pumps, 5 inches in diameter, raising 60 barrels per hour, to a height of 54 feet, =l horse. By calculation, as before...

...B HICK PLANKS FRAMES SAWING THICKNESS BOARDS MACHINERY TIMBER WOOD ROLLERS © Thomas Telford and ICE 1841 of a reflecting instrument, which is set so as to reflect the angle in that segment. The instrument which has been adapted by the author for this operation, consists of two...

...M I BRUNEL © Thomas Telford and ICE 1839 TUNNELS TUNNELLING SAND WATER POLING BOARDS THAMES LONDON UK Account of Boring for Water through Granite. By Frederick Holland. Communicated by Apsley Pellatt, A, Inst. C. E. Boring in A hole, 6 feetwide and 7 feet deep...

...M I BRUNEL TUNNELS POLING BOARDS TUNNELLING THAMES LONDON UK © Thomas Telford and ICE 1838 23 been sensiblydiminished. Theyhadtried chilled segments-these worethechains;theyconsequentlyreturnedto good grey iron. Three sets of segmentsarewornoutinthe course of a year. I n...

...M I BRUNEL POLING BOARDS TUNNELS SHIELDS PROTECTION TUNNELLING METHODS PANELS THAMES LONDON UK 5 Mr. Brunel then gave an accounot f the new Poling Boardswhich Thames he is employing for the effectualprotectionof the Shield at the Tanne . Tunnel. These constitute a system...