01013cam a22002651 4500 s 13000052 DLC 20260227111910.0 780313s1860 dcuab f000 0 eng c s 13000052 (OCoLC)3711828 Smithsonian Inst. Library NGenoU DLC premarc n-mx--- Q11 .S68 Sonntag, August. Observations on terrestrial magnetism in Mexico. Conducted under the direction of Baron von Müller, with notes and illustrations of an examination of the volcano Popocatepetl and its vicinity. By August Sonntag. [Washington, Smithsonian Institution, 1860] 4 p. l., 84 p. front. (map) illus. 33 cm. Smithsonian contributions to knowledge. [vol. XI, art. 7] Smithsonian Institution publication 114. Geomagnetism Mexico. Popocatépetl (Mexico) Mueller, Ferdinand von, 1825-1896. 52623 52623