Four books from the turn of the century

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1 x Theodor Rulemann "The Miracles of Electricity - Large Illustrated Practical Manual", Berlin: Verlagsdruckerei Merkur, probably around 1910, ill. Cloth binding, 1 x by Littrow "The Wonders of Heaven - Common Account of the World System", revised by Dr. Paul Guthnick, Berlin: Herlet, 1911, ill. Linen binding, 1 x "Goethe's Masterpieces", ill. Superb edition (here Volume I), Berlin: Merkur, probably around 1905, illustrated, embossed full linen as well as 1 x Gotthold Hahn "The mushroom collector or instructions for knowledge of the most important mushrooms in Germany and the neighboring countries", richly illustrated in part in colour, Gera : Herm. Kanitz Verlag, 1890, ill. Whole linen (soiled, best.), different. Signs of age and use