This survey has developed the older fossiliferous rocks, with a fullness and distinctness unknown elsewhere. Hence European savans study the New York Reports with eagerness. In 1850, as I entered the Woodwardian Museum, in the University of Cambridge, in England, I found Professor McCoy busy with a collection of Silurian fossils before him, which he was studying with Hall's first volume of Paleontology as his guide; and in the splendid volumes, entitled _British Paleozoric Rocks and Fossils_, which appeared last year as the result of those researches, I find Professor Hall denominated the great American Paleontologist. I tell you, Sir, that this survey has given New York a reputation throughout the learned world, of which she may well be proud. Am I told that it will, probably, cost half a million? Very well. The larger the sum, the higher will be the reputation of New York for liberality; and what other half million expended in our country, has developed so many new facts or thrown so much light upon the history of the globe, or won so world-wide and enviable a reputation? And of Geological Surveys in general:-- In regard to this matter of geological surveys, I can hardly avoid making a suggestion here. So large a portion of our country has now been examined, more or less thoroughly, by the several State governments, that it does seem to me the time has come when the National government should order a survey--geological, zoological, and botanical--of the whole country, on such a liberal and thorough plan as the surveys in Great Britain are now conducted; in the latter country it being understood that at least thirty years will be occupied in the work. Could not the distinguished New York statesman who was to have addressed us to-day be induced, when the present great struggle in which he is engaged shall have been brought to a close, by a merciful Providence, to introduce this subject, and urge it upon Congress? And would it not be appropriate for the American Association for the Advancement of Science to throw a petition before the government for such an object? Or might it not, with the consent of the eminent gentleman who has charge of the Coast Survey, be connected therewith, as it is with the Ordnance Survey in Great Britain. The history of the American Association was then given:--