History of the Barrage At the Head of the Delta of Egypt
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They were originally put in to prevent deposit of mud in front of the gates when shut. The gratings on the Rosetta Barrage were capable of discharging, with a head of 1. 75 metres, over 20, 000, 000 cubic metres per day, according to Mr. Willcocks. It was found that the severe action below the Barrage, when a gate was lowered to its full extent, was due to these iron gratings, and not, as it had been supposed, to a honey-combed foundation. Mr. Willcocks remarks that this fact was apparently unk...nown to the writers of the Reports on the Barrages, and points out that, it ought to have been evident that, if all the action observed was due to fissures in the foundation, the Barrage would have been swept away many years before. But though the existence of these iron gratings seems to have been forgotten in 1884, it was not so in 1871, for M. Lavalley in a Report on the Barrage dated 10^? April 1871 refers them in the following passage: - "Enfin les ouvertures qui existent dans les seuils en fonte devront etre bouchees.
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To quickly assess the difficulty of the text, read a short excerpt:
They were originally put in to prevent deposit of mud in front of the gates when shut. The gratings on the Rosetta Barrage were capable of discharging, with a head of 1. 75 metres, over 20, 000, 000 cubic metres per day, according to Mr. Willcocks. It was found that the severe action below the Barrage, when a gate was lowered to its full extent, was due to these iron gratings, and not, as it had been supposed, to a honey-combed foundation. Mr. Willcocks remarks that this fact was apparently unk...nown to the writers of the Reports on the Barrages, and points out that, it ought to have been evident that, if all the action observed was due to fissures in the foundation, the Barrage would have been swept away many years before. But though the existence of these iron gratings seems to have been forgotten in 1884, it was not so in 1871, for M. Lavalley in a Report on the Barrage dated 10^? April 1871 refers them in the following passage: - "Enfin les ouvertures qui existent dans les seuils en fonte devront etre bouchees.
What to read after History of the Barrage At the Head of the Delta of Egypt?
You can find similar books in the "Read Also" column, or choose other free books by Robert Hanbury Brown to read onlineMoreLess
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