THE BEGINNINGS OF AMERICAN SCIENCE.* THE THIRD CENTURY. BY G. BROWN GOODE. VIII. In the address which it was my privilege, one year ago, to read in the presence of this Society, I attempted to trace the progress of scientific activity in America from the time of the first settle ment by the English in 1585 to the end of the Revolution a period of nearly two hundred years. Resuming the subject, I shall now take up the consideration of the third century from 1782 to the present time. For con venience of discussion the time is divided, approximately, into decades, while the decades naturally fall into groups of three. From 1780 to 1810, from 1810 to 1840, from 1840 to 1870, and from 1870 to the close of the century, are periods in the history of American thought, each of which seems to be marked by characteristics of its own. These must have names, and it may not be inappropriate to call the first the period of Jefferson, the second that of Silliman, and the third that of Agassiz. The first was, of course, an extension of the period of Linnaeus, the second and third were during the mental supremacy of Cuvier and Von Baer and their schools, and the fourth or present, begin-ing in 1870, belongs to that of Darwin, the extension of whose influence to America was delayed by the tumults of the civil con vulsion which began in 1861 and ended in 1865. The "beginnings of American science" do not belong entirely * Annual Presidential Address delivered at the Seventh Anniversary Meeting of the Biological Society of Washington, January 22, 1887, in the Lecture Room of the U. S. National Museum.