delicate tincture of skin contrasted with the half petrified appearance of those who are obliged to drink _hard water_ always, and often to wash in it.” Such authority on this point we presume will not be disputed. Health, however, is no less promoted by the internal, than by the external use of water; and it is to be hoped, that but a short period will elapse, before free baths will be provided at the public expense, for the use of the poor, as well as the public generally. Daily ablution should be regarded as necessary as daily food or sleep. The advantages which soft water possesses over hard, in the thousand economical purposes of life, are too obvious to need particular remark. The lime contained in well water, renders it inapplicable to the purposes of brewing, tanning, washing, bleaching, and many other processes in the arts and domestic economy; and we believe the calculation would not be found extravagant, if we should say that by the use of the Croton water 100,000 dollars annually will be saved to the inhabitants of New-York, in the articles of soap and soda alone. When to this, we add the increased comfort and health of the citizens, from its free external and internal use,--the superior cleanliness of the streets, by the washing away of all stagnant matters in the sinks and gutters, and the consequent purity of the atmosphere,--the diminution of danger from fires, and the consequent reduction of rates of insurance, with other important advantages too numerous to detail, we shall not consider its introduction purchased at too dear a rate, even were the expenses attending it increased to double the actual amount. We need not attempt to specify in detail the benefits which are likely to accrue to the city of New-York from the introduction of an abundance of pure water. Its value is not to be estimated by dollars and cents; though it might easily be shown, that it already saves to the citizens a sum far exceeding the annual interest on its cost. We have already referred to its superiority as a solvent of vegetable matter, over the hard well water, formerly used. Since then, we have made a calculation, by which we are satisfied that in the single items of tea and coffee, it will save to the inhabitants of this city annually, not far from 90,000 dollars. To this may be added the improvement of the public health, and the consequent saving in medicine, and physicians’ fees, a sum probably exceeding that above specified; the increase of the working days, and the extension of the average period of working ability among the laboring classes; and lastly, the moral and intellectual advancement of the entire population, attendant upon the improvement of their physical condition; each of which is not an unimportant item in the aggregate of public prosperity and happiness.