Author: Wilsing, J. [Johannes]
Title: Determination of the Mean Density of the Earth by Means of a Pendulum Principle
Description: Washington [D.C.], Smithsonian Institution, 1890. Offprint. Paper wrappers. [635-646] pp. Illus. with 1 b/w in-text drawing. 8vo. J. Howard Gore, trans. Originally from Publicationen des Astrophysikalischen observatoriums zu Potsdam, vol. VI, Potsdam, 1887, 1888; article in Annual report of the Board of Regents of the Smithsonian Institution. Washington, The Institution, 1890. A very good copy in a plain paper wrapper.

Keywords: , Archaeology archéologique anthropologie anthropology geology, Pamphlet