American state papers : documents, legislative and executive, of the Congress of the United States ... . a series of levels, to be taken, as nearly as may be, on the prolongationof the axes of the tunnel from its outlet to where it shall intersect with the Harpeth. Answer. The course from the outlet of the tunnel to the nearest part of Harpeth is N. 48°, W. 211 poles,to the river bank, and 5| poles further to low-water mark. The prolongation of the axes of the tunnel onthe above course is at 5 poles from its outlet, 9 feet 1£ inch above the water in a lagoon; at 21 poles itstrikes the bank, an
American state papers : documents, legislative and executive, of the Congress of the United States ... . a series of levels, to be taken, as nearly as may be, on the prolongationof the axes of the tunnel from its outlet to where it shall intersect with the Harpeth. Answer. The course from the outlet of the tunnel to the nearest part of Harpeth is N. 48°, W. 211 poles,to the river bank, and 5| poles further to low-water mark. The prolongation of the axes of the tunnel onthe above course is at 5 poles from its outlet, 9 feet 1£ inch above the water in a lagoon; at 21 poles itstrikes the bank, and at 26 poles is at a point on the sand bar immediately over low-water mark, 11 feet6 inches. The river bank is 21| poles from the outlet of the tunnel, and is six inches higher than itscentre, from which the ground descends regularly to the bank of the lagoon—six poles from its outlet is5 feet 3 inches above low-water mark and 6 feet 3 inches below the centre of the tunnel. 1830.] SITE FOE AN ARMORY. 537 up- scale, 5 poles to [he inch. X2 feet from the top of the bankto low-water mark. o. Note.—The dotted line represents the axis of the tunnel, and theblack mark the bank. The following are the answers to a second series of queries of the commissione7s appointed to ascertain suitable site for a national armory on the western waters, by Joint Davis. Question, What is the difference of level of the extreme low-water mark at the entrance of ColonelBells tunnel and the bottom of the tunnel at its outlet, by levelling across the ridge which separatesthese two points ? Also, to run a horizontal line from the bottom of the tunnel at its outlet to the nearest part ofthe Harpeth river opposite to it, measuring at every half chain the elevation of the said horizontal lineabove the bottom land between the outlet of the tunnel and the river, so as to furnish the elements forconstructing a profile of the ground along the said line; the elevation of the point in the riv
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