Note 33 — GENERAL NOTICES.
Reading edition
Eighteenth Annual Report of the United States Geological Survey to the Secretary of the Interior, 1896-'97. Charles D. Walcott, Director. In Five Parts. Director's Report, including Triangulation and Spirit Leveling. Pp. 450, with 4 plates. Part II; Papers chiefly of a Theoretic Nature. Pp. 653, with 105 plates. Part III; Economic Geology. Pp. 861, with 118 plates. Part IV; Hydrography. Pp. 756, with 102 plates.