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1. Moritz J H Busch, Prince Bismark in Private Life, Harper's New Monthly Magazine, 8 (1884), 187–96.
2. Hermann von Helmholtz, [Review of On the Hypotheses Upon Which Geometry is Based, by Georg F B Riemann], Academy, 1 (1869–70), 128–30.
3. Anon, Physics and Astronomy[1] The Aperiodic Movements of Deadened Magnetic Needles[2] Regulator for Electric Light[3] Breadth of the Spectrum-Lines[4] Dynamic Power of the Sun[5] The Motion of the Solar Prominences[6] A Water Telescope, Academy, 1 (1869–70), 237–38.