A description from such source, accompanied with detailed plans of all the appurtenances of the Aqueduct, with the results of experiments on the flow of water in the Aqueduct,

would be a useful contribution to the cause of science, a valuable work to Engineers generally, and particularly so to younger members of the profession. The history which I have given of the preliminary measures leading to the accomplishment of this work, has been obtained, mainly, from printed documents of the Common Council. I have also had conversations with per-

sons who were intimately concerned in some of those measures, and trust that I have made the history sufficiently full to embrace the leading steps which were taken.

The accounts of the Aqueducts of ancient Rome, and those built by the ancient Romans in other parts of Europe, also that of the Aqueducts of modern Rome, of Italy, France, &c, have been mostly obtained from the French work of J. Rondolet, in which the aecount of the Aqueducts of ancient Rome is translated from the Latin of Frontinus. For the account of the Aqueducts of Mexico and South America, I am indebted, in a great degree, to " Bradford's Antiquities of America" and " Ewbank's Hydraulics." F. B. Tower.

TABLE OF CONTENTS ------ Page.

------- Aqueducts of Ancient Rome,

------ Principal Aqueducts constructed by the Ancient Romans in other parts of Europe, Aqueducts of Modern Rome,

Principal Modern Aqueducts of Italy, France, etc., - - 30

... ........ Aqueducts of Mexico and the adjacent States, Aqueducts of South America, Fountains, -