Figure 1. At left: a schematic of Nier’s 1935 instrument. The cross section is of the mass analyzer. Note the 180 o path. The diagram below it illustrates the electron-impact method of ionization. From Alfred O. Nier, “A Mass-Spectrographic Study of the Isotopes of Argon, Potassium, Rubidium and ... More about this image found in At left: a schematic of Nier’s 1935 instrument. The cross section is of the...

Figure 2. At left: Alfred Nier in the late 1940s, working at a version of his 60-degree sector field mass spectrometer. Note the 60 o inflection of the mass analyzer tube as it passes between the poles of the magnet at the center of the photograph. Unlabeled photograph from the NP, box 34, letter... More about this image found in At left: Alfred Nier in the late 1940s, working at a version of his 60-degr...

Figure 1. Interior of Frank Gehry’s office. Photo by Martin Crook, https://www.martincrook.com . More about this image found in Interior of Frank Gehry’s office. Photo by Martin Crook, https://www.marti...

Figure 2. The paper format and its entourage. Drawing by Walter Porstmann, before 1927. Courtesy Sammlung Freese. More about this image found in The paper format and its entourage. Drawing by Walter Porstmann, before 192...

Figure 3 (a) Section drawing and Stackable Dishware series TC100. (b) Section of the Stackable Dishware Series TC100; (c) Stackable Dishware Series TC100. Diploma thesis project by Nick Roericht at the HfG Ulm, 1959. More about this image found in (a) Section drawing and Stackable Dishware series TC100. (b) Section of the...

Figure 4. “Schematized Work Process” in an Information Brochure Geschwister Scholl Stiftung for the Hochschule für Gestaltung Ulm, ca. 1951. HfG Archiv, Museum Ulm. More about this image found in “Schematized Work Process” in an Information Brochure Geschwister Scholl St...

Figure 5. Snapshot of the sculpture “World Rescue Project” by Vanda Vieira-Schmidt in the Prinzhorn Collection 1995–2005. Photo by Torsten Kappenberg. More about this image found in Snapshot of the sculpture “World Rescue Project” by Vanda Vieira-Schmidt in...

Figure 1. Diagram of Exner’s electroscope. Left: brass plates holding the delicate leaves flush against the central column to secure them during travel. Right: the plates are withdrawn allowing the leaves to fluctuate. Source: “Über transportable Apparate zur Beobachtung der atmosphärischen Elektr... More about this image found in Diagram of Exner’s electroscope. Left: brass plates holding the delicate le...

Figure 2. Variation of a Wasserinfluenzmaschine. Source: Elster and Geitel, “Notiz über einen empfindlichen Duplicator,” Ann. Phys. 25 (1885): table 1. More about this image found in Variation of a Wasserinfluenzmaschine. Source: Elster and Geitel, “Notiz üb...

Figure 3. A Niederschlagssammler with electrical insulation (A–D) surrounding the zinc dish (Z), and electrometer (E), in an upward-opening, grounded vessel (N). Source: Fricke, and Schlegel, “Julius Elster and Hans Geitel—Dioscuri of Physics and Pioneer Investigators in Atmospheric Electricity, ”... More about this image found in A Niederschlagssammler with electrical insulation (A–D) surrounding the zin...

Figure 4. A Zerstreuungsapparat resting on its carrying case, manufactured by Günther and Tegetmeyer. Source: Mache and Schweidler, Die atmosphärische Elektrizität (Braunschweig: F. Vieweg und Sohn, 1909), 53. More about this image found in A Zerstreuungsapparat resting on its carrying case, manufactured by Günther...

Figure 1. The first image of the shadow of a black hole based on observation, April 10, 2019. Credit: Event Horizon Telescope Collaboration. Creative Commons Attribution 4.0 International License. More about this image found in The first image of the shadow of a black hole based on observation, April 1...

Figure 2. Jean-Pierre Luminet, photograph of a drawing (originally black Indian ink on transparent Canson paper), 1978. Courtesy of Jean-Pierre Luminet. More about this image found in Jean-Pierre Luminet, photograph of a drawing (originally black Indian ink o...