501. Anchor Escapement with Lever Ankerhemmung mit Unruhe Collection: Reuleaux Kinematic Mechanisms Collection Set: X. Clock Escapements Date: 1882 Format: Image Designer: Reuleaux, F. (Franz), 1829-1905 Manufacturer: Gustav Voigt Werkstatt
502. Anchor Deadbeat Escapement Hemmung mit gewöhnlichem Graham-Anker Collection: Reuleaux Kinematic Mechanisms Collection Set: X. Clock Escapements Date: 1882 Format: Image Designer: Reuleaux, F. (Franz), 1829-1905 Manufacturer: Gustav Voigt Werkstatt
503. Alternating-clamp, Friction Clutch Ratchet Drosselklemm-Gesperre Collection: Reuleaux Kinematic Mechanisms Collection Set: N. Ratchet Mechanisms Date: 1882 Format: Image Designer: Reuleaux, F. (Franz), 1829-1905 Manufacturer: Gustav Voigt Werkstatt
504. Alraunen duo Collection: Postcards of female and male impersonators and cross-dressing in Europe and the United States, 1900-1930 Date: 1913 (postmarked) Format: Image Photographer: Fotograf Fritz Frank, Frankfurt
505. Alraunen duo Collection: Postcards of female and male impersonators and cross-dressing in Europe and the United States, 1900-1930 Date: 1913 (postmarked) Format: Image Photographer: Fotograf Fritz Frank, Frankfurt
506. Adjustable Belt Drive for Parallel Axis Pulleys Leitrollentrieb für parallele Achsen Collection: Reuleaux Kinematic Mechanisms Collection Set: V. Belt Drive Mechanisms Date: 1882 Format: Image Designer: Reuleaux, F. (Franz), 1829-1905 Manufacturer: Gustav Voigt Werkstatt
507. Acanthis hollbölli Collection: Hill Ornithology Collection Date: 1850 Format: Image Creator: Baedeker, F. W. J. (Friedrich Wilhelm Justus) (German pharmacist, ornithologist, and ornithological illustrator, 1787-1865) Engraver: Schlegel, Hermann, 1804-1884
