The statements given are necessarily much condensed, without an attempt to follow all changes of title; furthermore, the dates of actual publication for the academies given above are often somewhat vaguely recorded. For fuller information see Scudder’s “Catalogue of Scientific Serials, 1633–1876,” Cambridge, 1876; also H. Carrington Bolton’s “Catalogue of Scientific and Technical Periodicals, 1665–1882” (Smithsonian Institution, 1885). The writer is much indebted to Mr. C. J. Barr, Assistant Librarian of Yale University Library, for his valuable assistance in this connection. Footnote 2: The following footnote accompanies the opening article of the first volume of the Journal. “From the MS. papers of the Connecticut Academy, now published by permission.” Similar notes appear elsewhere. Ed. II A CENTURY OF GEOLOGY.—THE PROGRESS OF HISTORICAL GEOLOGY IN NORTH AMERICA By CHARLES SCHUCHERT _Introduction._ The American Journal of Science, “one of the greatest influences in American geology,” founded in 1818, has published a little more than 92,000 pages of scientific matter. Of geology, including mineralogy, there appear to be upward of 20,000 pages. What a vast treasure house of geologic knowledge is stored in these 194 volumes, and how well the editors have lived up to their proposed “plan of work” as stated in the opening volume, where Silliman says: “It is designed as a deposit for original American communications” in “the physical sciences ... and especially our mineralogy and geology” (=1=, v, 1818)! Not only is it the oldest continuously published scientific journal of this country, but it has proved itself to be “perhaps the most important geological periodical in America” (Merrill). It is impossible to adequately present in this memorial volume of the Journal the contents of the articles on the geological sciences. Editor Silliman was not only the founder of the Journal, but the generating center for the making of geologists and promoting geology during the rise of this science in America. For nearly three decades, the workers came to him for counsel and help, and he had a kind paternal word for them all. This influence is also shown in the many letters which were addressed to him, and which he published in the Journal. A similar influence, paternal care, and constructive criticism were continued by James D. Dana, and especially in his earlier career as editor.