a case of liquid air from Washington. Extreme interest was mani fest throughout, for as the professor expressed ito it was "the lowest temperature ever produced at State." After the experi ments a smoker was held, and stories and conundrums were ex changed. —The Governor to-day also appointed Professor H. A. Sur face, of State College, as Economic Zoologist, to succeed Ben jamin F. MacCartnev, of Hamilton.—Phila. North American, March ;o. "There are two kinds of books that you will need in your library, first those which represent the highest and best achieve ments of the master minds of the ages ; second, those which are valuable only for the information contained in them, or for, their connection with that department of the world's work which is your own."—James Baldwin. The book list of the month, although shorter than usual, is im portant, as some of the works contained in it form the nucleus of a proposed special collection on military subjects, to be pur chased by the military department. These, when not in use in the military class room, 'will be kept in the new book case in the farther corner of the stack room. "The Soudan Campaign," with its acount of the tragedy of Kartoum, and the fate of General Gordon, written' by Col. Col ville, who served in the expedition, the "Franco-German War," by one of its distinguished generals, Von Moltke, and the story of Napoleon's first brilliant campaign, introduce us to some master minds and their great achievements. The new edition of "Beacon Lights of History" belongs in the same class, and will be found also a convenient work of reference. Adams, B. B.—Block System of Signaling on American Rail roads. 1901. Colville, H. E.—History of the Soudan Campaign. 1-3rd. Kruger, S. J. P.—Memoirs of Paul Kruger. LIBRARY NOTES. 1902.