The chemical dispute about the conversion and reconversion of air and water, continues still undecided. Arguments and authorities are so balanced, that we may still safely believe, as our fathers did before us, that these principles are distinct. A schism of another kind, has taken place among the chemists. A particular set of them here, have undertaken to remodel all the terms of the science, and to give to every substance a new name, the composition, and especially the termination of which, shall define the relation in which it stands to other substances of the same family. But the science seems too much in its infancy as yet, for this reformation; because, in fact, the reformation of this year must be reformed again the next year, and so on, changing the names of substances as often as new experiments develop properties in them undiscovered before. The new nomenclature has, accordingly, been already proved to need numerous and important reformations. Probably it will not prevail. It is espoused by the minority only here, and by very few, indeed, of the foreign chemists. It is particularly rejected in England. In the arts, I think two of our countrymen have presented the most important inventions. Mr. Paine, the author of "Common Sense," has invented an iron bridge, which promises to be cheaper by a great deal than stone, and to admit of a much greater arch. He supposes it may be ventured for an arch of five hundred feet. He has obtained a patent for it in England, and is now executing the first experiment with an arch of between ninety and one hundred feet. Mr. Rumsey has also obtained a patent for his navigation by the force of steam, in England, and is soliciting a similar one here. His principal merit is in the improvement of the boiler, and, instead of the complicated machinery of oars and paddles, proposed by others, the substitution of so simple a thing as the reaction of a stream of water on his vessel. He is building a sea vessel at this time in England, and she will be ready for an experiment in May. He has suggested a great number of mechanical improvements in a variety of branches; and upon the whole, is the most original and the greatest mechanical genius I have ever seen. The return of La Peyrouse (whenever that shall happen) will probably add to our knowledge in Geography, Botany, and Natural History. What a field have we at our doors to signalize ourselves in! The Botany of America is far from being exhausted, its Mineralogy is untouched, and its Natural History or Zoology, totally mistaken and misrepresented. As far as I have seen, there is not one single species of terrestrial birds common to Europe and America, and I question if there be a single species of quadrupeds. (Domestic animals are to be excepted.) It is for such institutions as that over which you preside so worthily, Sir, to do justice to our country, its productions and its genius. It is the work to which the young men, whom you are forming, should lay their