Search Results
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2 items
Postcard of William Thomson sent to Georg Bredig
- 1913-Mar-21
Postcard of William Thomson, 1st Baron Kelvin (1824- 1907), sent to Georg Bredig (1868-1944) by an unidentified sender. William Thomson was a British mathematician, physicist, and engineer. He became Baron Kelvin in…
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2 items
Postcard of Julius Wagner sent to Georg Bredig
- 1910-Feb-19
Postcard to Georg Bredig (1868-1944) from an unidentified sender. The postcard features a black and white portrait of Julius Wagner (1857-1924). Wagner was a German physical chemist and professor at the University of…
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3 items
Obituary for Louis Henry
- Circa 1913
Obituary for Louis Henry (1834-1913), a Belgian organic chemist who synthesized hundreds of new compounds in his lifetime. Henry notably coined the Henry reaction, which is today a classic carbon-carbon bond formation…
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2 items
Portrait of Wilhelm Salomon-Calvi
- 1910-Mar-27
Black and white portrait of Wilhelm Salomon-Calvi (1868-1941), taken in Heidelberg, Germany.
Saloman-Calvi was a German geologist and paleontologist. In 1893 he started working at the University of Heidelberg as a…
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Portrait of Julius Wilhelm Brühl
- 1910-Mar
Black and white photograph of a man, likely Julius Wilhelm Brühl (1850-1911), sitting outside in a garden.
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2 items
Portrait of a sitter, possibly Aleksandr Nikolaevich Lebedev, 1910
- 1910-Aug-01
Black and white stereograph addressed to Georg Bredig (1868-1944) of a scientist, possibly Aleksandr Nikolaevich Lebedev (1869–1937) posing with a table of glassware and apparatuses. The work is signed by Peter…
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2 items
Portrait of Theodor Curtius, 1910
- 1910
Portrait of Theodor Curtius (1857-1928) taken at E. Schultze photography studio.
Throughout his career, Curtius was a professor of chemistry at the University of Heidelberg, the director of the analytical chemistry…
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2 items
Portrait of Victor Goldschmidt
- 1910
Portrait of Victor Goldschmidt (1853-1933). Goldschmidt was a German mineralogist known for his work in crystallography. He founded the Institut für Mineralogie und Kristallographie in Heidelberg and was a professor at…
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2 items
Portrait of Richard Abegg, 1910
- 1910
Portrait of Richard Abegg (1869-1910). Abegg was a German physical chemist known for his work in valence theory which led to the later octet rule. At the time this letter was written, Abegg was the Editor of the…
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2 items
Portrait of Julius Mohr
- 1910-Mar
Portrait of Julius Mohr (1873- 1970). Mohr is known for his work in tropical soil science. He worked in Indonesia, Amsterdam, and Utrecht as a scientist and professor.
- Photographer Raupp, Erwin
- Subject Mohr, Julius, 1873- 1970, Soil science, Scientists, College teachers, Carte de visite photographs
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2 items
Georg Bredig and fellow chemists in Zürich
- 1910
Black and white photograph of Georg Bredig (1868-1944) and fellow chemists at the Technische Hochschule, in Zürich, Switzerland. Bredig is seated and reading a book while his colleagues pose around him. Bredig has…
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2 items
Georg Bredig and fellow chemists in Zürich
- 1910
Black and white photograph of Georg Bredig (1868-1944) and fellow chemists at the Technische Hochschule, in Zürich, Switzerland. Bredig is seated and his colleagues are posed around him. Bredig has annotated the names…
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2 items
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2 items
Portrait of Ernst Cohen
- After 1895 – before 1933
Portrait of Ernst Cohen (1869-1944) by Koene & Büttinghausen in the Netherlands.
Ernst Cohen, a Dutch scientist and professor, was known for his research on the allotropy of tin. Cohen worked under Svante Arrhenius…
- Photographer Koene & Büttinghausen
- Subject Cohen, Ernst, 1869-1944, Chemists, Jewish scientists, Carte de visite photographs
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11 items
The Life of Ellen H. Richards
- 1912
Ellen H. Swallow Richards (1842-1911) was one of America's first female professional chemists and the first woman to be accepted by a scientific school. She is best known for pioneering the field of sanitary…
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Models of engines
- 1912
Catalog entries for steam and gas engines.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory instruments for the physical sciences made by the Central Scientific Company.…
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Wimherst Self-Charging Static Machine
- 1912
Catalog entry for a Wimhurst Machine, a static electricity generator used for experiments and powering X-ray machines.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory…
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Wave Apparatus
- 1912
Catalog entry for wave apparatuses for the study of transverse and longitudinal waves.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory instruments for the physical sciences…
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CENCO Meters
- 1912
Catalog entries for voltameters, instruments for measuring both voltage and amperes of direct electric current.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory instruments…
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Various Vacuum Tubes
- 1912
Catalog entry for various vacuum tubes for cathode-ray demonstrations, including Crookes' Tubes, Holtz' Tube, and Lenard's Tube.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of…
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Melloni's Apparatus and Parabolic Reflectors
- 1912
Catalog entries for Parabolic Reflectors, used to collect sound, light or radio waves,
and Melloni's Apparatus, for demonstrating the phenomena of absorption, polarization, reflection, and refraction of radiant heat.
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Various Geissler Tubes
- 1912
Catalog entry for various geissler tubes for demonstration purposes. Invented by the glassblower, Johann Heinrich Wilhelm Geissler (1815-1878), a light is produced when an electric current is passed through the rarefied…
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Spectroscopes
- 1912
Catalog entry for two spectroscopes. Spectroscopes use a lens or prism to disperse light into wavelengths. The spectroscopes shown can be handheld (top image) or attached to a camera (bottom image) to record the…
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Precision Photometers
- 1912
Catalog entry for instruments designed for photometric analysis. Photometers can be used to measure the presence and concentration of organic and inorganic compounds in solution by determining the absorbance of specific…
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Heavy Current Static Machines
- 1912
Catalog entry for a heavy current static machine.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory instruments for the physical sciences made by the Central Scientific…