the Croton may not be introduced from some different head, or by some other method, and at a much less cost, than that estimated in the report of 1833. On the 31st of December, 1833, something more than a month after we had presented our report to the Common Council, Mr. D. S. Rhodes addressed a communication to the Board of Aldermen, proposing, for one million seven hundred thousand dollars, to introduce, through iron pipes, from the mouth of the Croton river, six million gallons of water every twenty-four hours and for two million seven hundred thousand dollars, to ;

introduce sixteen million of gallons into the city of New York, at an elevation of 125 feet above low water, (see Corporation Document, No.54 ;) he presented another communication on the 6th of January, 1834, objecting to the plan proposed by our engineer in " that the most serious 1833, for conducting the waters of the Croton to the city, stating, objection he has to urge against the plan is, that the water, however pure it may be at the fountain head, must inevitably become contaminated with some deleterious substance passing over such a variety of soils, and amalgamating so many mineral substances." He then proposes constructing a dam near the Quaker Bridge, on the Croton river, 45 feet high, which will give an elevation or head of 125 feet above tide of the Hudson ; " from this dam the pipes will rise gradually until they pass Sing Sing," and from thence descend to the shores of the he " forms almost a line Hudson, which, (as states) straight to the city, and very few obstacles to overcome the Harlem river will be crossed at very ;