... up through the bottom of the trench, and induced the formation of springs, which would wash the cement out of the concrete. The formation of sumps and under-drainage in thetrench was made difficult and almost impractical by the quantity of sand which rose quickly from the foundation. Apart from...

...H J B HARDING; A B SEARLE; E J BUCKTON; H J FEREDAY © Thomas Telford and ICE 1936 DEMOLITION BRIDGES WATERLOO BRIDGE PIERS MORTAR CEMENTATION FOUNDATIONS EFFECT RIVERS TIMBER PILES WATERLOO THAMES LONDON UK THE DEMOLITION O F WATERLOO BRIDGE. 517...

... dust, which was of particle size lessthan 10 microns, suspended in the airduring that operation had consisted practicallyall of cement-dust, the free silica forming under 1 per cent. There was thus no danger of workmen developing silicosis in such operations. Professor DOUGLAHS AYpointed out...