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abatement Alexander's Island answer artificial aid B. H. LATROBE bar formed beg leave believe carried cease circumstances city channel city shore committee confined conse constructed corporation of Georgetown created deep channel deflected Delaware deposit of alluvium depth of water Digges's point distance district Eastern Branch ebb and flood ebb tide eddy effect erected expansion fact falls feet deep foot of Mason's force freshets gation ginia Greenleaf's point high water injury James river keep open land current land water Mason's Island middle channel momentum Moore Moore's mouth obstructed operation opinion opposite pass passage piers produce projected projector quence question rapidity remove resistance respect river Potomac Robert Peter ship navigation shipping harbor side of Mason's slack water squares 473 stagnant water stream strikes the shore strong sufficiently tain Thomas Moore Tiber tide of ebb tide of flood tide rises tion Virginia channel Virginia shore Washington bridge wharves
Page iii - The report of the committee of the House of Representatives, to whom was referred the Governor's message on the subject of free schools, concurred in this view.
Page 21 - Is it possible to improve the natural bed of any liver, which is subject to freshes that bring down alluvium from the upper country, so as to prevent the deposition of that alluvium in the form of bars, at the place at which the rapidity of the current is repelled, slackened, or annihilated, by the flood tides, or by its expansion...
Page 21 - Baltic, they have . never succeeded in one single instance to effect a permanent channel through a natural bar, but have always done permanent injury, where they have even effected a temporary good.
Page 22 - ... full work until the Spanish army retreated through the mines before .the patriots, and) on their retreat broke the engines, and threw them into the engine pits. For a report of my progress in Peru, see the first number of the Geological transactions of Cornwall, copied from the Lima Gazettes. In reply to the questions put to me by the committee of the House of Commons, respecting the probable process of steam power for locomotive purposes, I beg to say, on railroads, they have been proved to...
Page 14 - In the Potomac, on the contrary, the effect of the flood as' a current ceases at the bar, and this very circumstance alone, has caused the bar to be deposited where it \s now lodged.
Page 17 - ... increase the evil, by creating a hole at their mouth, and for some distance below, and heaving up a bar beyond it.