I am sensible that we should not too hastily conclude that the above is the total amount of the supply that may be derived from this source ; I think it very probable, that from the nature of the surrounding ground, (which is a coarseand porous gravel,) a considerable portion thereof, may percolate through, into the adjacent rivers. Much, and perhaps the greatest quantity, is also daily drawn off by the Tea- Water Pump ; which, from its vicinity, I have no doubt is supplied from the same source.

It is true, that by sinking deeper into the earth, an augmentation of quantity would be procured ; yet if we went lower than the surface of the tide-water, I apprehend that the quality would be materially injured. Leaving the question, as I fear it will remain undetermined, we next proceed to examine the quality of the respective waters. To appreciate their merits fairly, we should judge of their utility, by the extent of their application. Proceeding on this ground, I believe it may be safely affirmed, that the water of the Bronx, is at least equal to that of the Collect though this is contrary to the gene- ;

ral opinion. The only reason that I can perceive for the preference usually given to the last mentioned, arises solely from its superior coolness. However grateful this may be to our feelings, it does not follow that it is equally conducive to healthfor whatever degree ;

of purity it may now possess, the period is not very remote, when from the natural increase of the city, these springs must be subject to those contaminations which have already rendered so many wells unfit for use, an evil that is daily increasing, and to which no effectual remedy can be applied ; this to me has ever appeared an insurmountable objection.