Contains among other things: The culture of Manihot Glaziovii and the extraction and preparation of rubber in East Africa P. Wolff, A visit to the countries of Lake Chad F. Wolff, The economic area of the Kano railway in northern Nigeria

Contains among other things: Confidential commercial information on colonial products

Contains among other things: Economic situation of the then D e u t s c h - O s t a f r i k a after the 1st World War. - Report of the Legation Council Gunzert of October 1928

Contains among other things: English Colonial Reports on the Gold Coast (1889/1891) and Northern Nigeria (1905) Wolff, The Economic Area of the Kano Railway in Northern Nigeria (special edition), 1914 A. Schubert, The agriculture of the islands Sao Thomé and Principe, after 1914

Contains: Foundation of a fig banana company

1870-1872 teacher at the Seminar d. RMG, 1873-1880 in Otjimbingue, 1880-1887 pastor in Königsberg, 1887-1889 inspector of the East Africa Mission and lecturer at the Oriental Seminar Berlin III; Letters and Reports, 1872-1880; Protocoll about the abolition of the forging of the Mission Colony Otjimbingue, 1874; Regen im Damralande, 7 p., hs., 1875; Löwengeschichten, 10 p. hs..., 1875; Sociale Verhältnisse im Hereroland, 36 p., hs., 1876; Die Bergdamra, 16 p., 1877; Wege im Damaraland, 16 p., 1877; 2 letters of J. Chr. Goliath from d. Augustineum, 1877; The Augustineum in Otjimbingue, 5 p.., hs., 1877; school visit in Hererolande, 20 p., hs., 1879; church consecration in Scheppmannsdorf, 10 p., 1879; September 1990 preserved: Personal Diarium of Büttner from the years 1867-1871; biographical material on Büttner (copies) by Prof. Ernst Hans Dammann;[Büttner's letters contain interesting information on the Mission Trade Society and on political conditions in Southwest Africa, see also Bethel Mission];

Contains among other things: Journeys through German East Africa

Contains among other things: Sending of seeds and offers of machines for oil extraction

Contains among other things: Kamerun-Kautschuk-Compagnie AG, Annual Report on the 27 Business Year 1932, Berlin, 1933 Erwin Mai, Die Kakaokultur an der Goldküste und ihre sozial-geographischen Wirkungen. Berlin 1933