...T D KEY © Thomas Telford and ICE 1948 CLEANING FILTERS SAND SLOW RAPID GRAVITY REACTIONS BEDS AIR SCOUR REVERSE WATER FLOW SILT WATERWORKS ALEXANDRIA SIOUF EGYPT AFRICA KEY ON CLEFAILNOSTAIFNENGRDS. 323 Paper No. 5460. U Cleaning of Filter Sands." By THOMADS...

... of h i t e length the body of the water cannot continue to move fdrward after the first waves have reached the EXPERIMENTS WITH SAND OF VERY LOW DENSITY. 453 end.Therefore a. reverse current equal to the forward currentmust be superimposed onthe whole system in order to bring the mean movement to zero...

...A A PAUL; P W ABELES; W F BEATTY; K HAJNAL KONYI; K W MAUTNER; W J SIVEWRIGHT; C TINKLER MESSRS. MOUCHEL & PARTNERS USAGE PRECAST PRESTRESSED CONCRETE BEAMS BRIDGES DECKS CONSTRUCTION RESISTANCE STRESS CRACKS LOADS DISTRIBUTION SUPERSTRUCTURES FRAGILITY REVERSE LOADING...