Fernmeldewesen. - Realisation of radio-telegraphic experiments with mobile stations by First Lieutenant Plieninger, 1907 - 1908

1905-1913, Federal Archives, BArch R 175-I Gouvernement of Cameroon

Plan of the Residenturpost Binder, 1:400, Monochrome ink drawing, Dühring, Lieutenant and Post Commander Site plan of the Residenturpost Garua, 1:2 000, Monochrome drawing, ca. 1908 Site plan of the Residenturpost Garua, Multicoloured drawing (illegible) NCO, ca. 1910 Expansion and fortification of the Residenturpost, 1905 - 1907 Residenturpost Garua, 1908 - 1909

Contains among other things: Economic situation in the south of the protectorate of Cameroon (rubber crisis, road construction, labour question)

Fernmeldeverbindungen in die benachbarten Gebiete und nach Übersee. - Telegraph connections Duala (Bell Town) Bonny Nigeria. - Contract between the Imperial Government and the African Direct Telegraph Company, Ltd. (copy), 26.11.1892 [fol. 77 - 85] Recruitment and provision of workers for the construction, operation and maintenance of telegraph and telephone connections in the protectorate of Cameroon, 1889 - 1908 Labour and carrier system. - Duala Buea, 1898 - 1903

Anwerbung und Bereitstellung von Arbeitern für den Bau, Betrieb und die Unterhaltung der Telegrafen- und Telefonverbindungen im Schutzgebiet Kamerun, 1889 - 1908 Arbeiter- und Trägerwesen. - Duala Buea, 1898 - 1903 Labour and porters. - Duala Edea, 1902 - 1903

Bereitstellung von Tributarbeiter für den Telegrafendurchbau nach Kribi entlang der Küste. - Report by Lieutenant von Sobbe, Edea, 5 September 1904 [fol. 98 - 99] Construction of telephone and telegraph connections. - Duala - Jabassi, 1904 Construction of telephone and telegraph connections. - Recruitment and provision of workers for the construction, operation and maintenance of telegraph and telephone lines in the Cameroon Protectorate, 1889 - 1908 Construction of telephone and telegraph lines. - Duala - Edea, 1902 - 1903 Construction of telephone and telegraph lines. - Kribi - Lolodorf - Jaunde - Akonolinga and plans for the continuation Lomie - Molundu, 1904 - 1908

Anwerbung und Bereitstellung von Arbeitern für den Bau, Betrieb und die Unterhaltung der Telegrafen- und Telefonverbindungen im Schutzgebiet Kamerun, 1889 - 1908 Bau von Fernsprech- und Telegrafenverbindungen. - Kribi - Lolodorf - Jaunde - Akonolinga and planning for the continuation of the Lomie - Molundu line, 1904 - 1908 Construction of telephone and telegraph lines. - Extension of the British telegraph connection Jola - Garua. - Planning and discontinuation due to unfavourable British conditions, 1906 - 1908

Troubles causées par le Chef Titi de Ndogpenda. - Rapport du Premier-Lieutenant Buthut, Yabassi, 17 May 1908nnRecrutement et mise à disposition des travailleurs pour la construction, le fonctionnement et l'entretien des liaisons télégraphiques et téléphoniques dans le Protectorat du Cameroun, 1818 - 1908nnProlongement de la liaison télégraphique britannique Yola - Garoua. - Planification et interruption en raison des conditions britanniques défavorables, 1906 - 1908nnn

Plan d'ensemble de Kribi, 1:5 000, dessin multicolore, (1905)nnFortification de la Station, 1905n

Relations with the commander of the Territoire militaire du Tchad. - Report by Dr Ebermaier to the Imperial Colonial Office, 1903 [fol. 82 - 85] Alleged threats by African employees of French merchants about an imminent Franco-German war and the resulting seizure of Adamaua and punishment of all natives opposed to France. - Investigation, 1913 [fol. 115 - 126] Sketch of North Cameroon with the areas of the Binder (Marua) and Ngaundere posts as well as the customs posts of the Residenturen, (1912) Map of the course of the French stage road Ham am Logone - bis Lere am Benue-Fluss 1:500 000 Blueprint with coloured drawing, 1912

Contains also: Correspondence about the expropriation of the natives in Duala (Cameroon)

Brief description: * 16 November 1906 in Cologne † 14 January 1995 in Darmstadt-Eberstadt. 1913 to 1926 he attended the Realgymnasium in Siegen. Already at the age of 17 he built his first radio receiver, which, except for the audio tube, was completely "homemade". The battery part of this receiver can be seen in the Technology Museum, Communications Engineering section. From 1926 to 1932 he studied electrical telecommunications, photography and cinematography at the Technische Hochschule Berlin. From 1926 to 1927, he completed an internship at Siemens

Contains: General map of the Reich telegraph and telephone connections in Togo, status 1 Apr. 1914