Search Results
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3 items
Folders belonging to Georg Bredig
- 1901 – 1939
Two paper Leitz brand folders with handwritten annotations by Georg Bredig (1868-1944)
- Contributor Bredig, Georg, 1868-1944
- Subject Bredig, Georg, 1868-1944, Office equipment and supplies
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3 items
Lablache Face Powder
- 1910s
An empty circular white cardboard box with gold rims that held a face powder. The paper label is decorated with a winged cherub holding aloft a Lablache Face Powder banner with the words "a harmless toilet powder"…
- Manufacturer Ben Levy Co.
- Subject Cosmetics, Cosmetics industry, Powder boxes (Cosmetics containers), Powders, Packaging
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2 items
Letter from Paul Walden to Georg Bredig, October 1912
- 1912-Oct-27 – 1912-Nov-09
Letter from Paul Walden (1863-1957) to Georg Bredig (1868-1944). Walden thanks Bredig for a previous letter and reminisces about working together and their previous mentors.
Walden was a chemist, who is most known for…
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6 items
No. 4 Inverted Mantle with No. 8 Magnesia Ring
- 1890 – 1930
Unused Welsbach No. 4 Inverted Mantle and No. 8 Magnesia Ring in its original cardboard box from Lindsay Light and Chemical Company.
The Welsbach gas mantle is a device made of fibers impregnated with oxides of cerium…
- Creator Of Work Welsbach Gas Light Company
- Contributor Auer v. Welsbach, Carl (Auer von Welsbach), 1858-1929
- Subject Lighting--Equipment and supplies, Incandescent lamps, Auer v. Welsbach, Carl (Auer von Welsbach), 1858-1929, Gas-lighting, Incandescent gas-lighting, Rare earth industry, Welsbach Gas Light Company, Rare earths
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2 items
Erfinder und Erfindungen
- Inventors and Inventions
- 1913
Digitized content includes a frontispiece portrait of Austrian chemist Carl Auer von Welsbach (1858-1929), a key figure in the history of rare earth elements. In 1885 Welsbach showed didymium was not an element, but an…
- Author Neuburger, Albert, 1867-1943
- Publisher Ullstein GmbH
- Subject Inventors, Inventions, Scientific apparatus and instruments, Auer v. Welsbach, Carl (Auer von Welsbach), 1858-1929, Neuburger, Albert, 1867-1943, Incandescent lamps, Welsbach Gas Light Company, Rare earth industry, Rare earths, Incandescent gas-lighting
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2 items
Postcard from Knoevenagel to Georg Bredig
- 1913-Sep-03
Postcard sent from "Knoevenagel" to Georg Bredig (1868-1944). The postcard features a photograph of a man riding a horse in a field.
- Addressee Bredig, Georg, 1868-1944
- Photographer Landes, Richard
- Subject Bredig, Georg, 1868-1944, Landscapes, Horsemanship
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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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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 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…
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Universal Physical Laboratory Supports
- 1912
Illustration of possible combinations of laboratory equipment on the "Universal Physical Laboratory Supports."
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory instruments…
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Lamp Rheostat
- 1912
Catalog entry for "Parsons' latest improved design, for controlling incandescent lighting circuits, and for demonstrating the laws of series and parallel combinations."
Part of Catalog K: Physical Apparatus for…
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Electrometers
- 1912
Catalog entries for a quadrant electrometer and an electrometer for radioactive measurements.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory instruments for the physical…
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Electro Magnet with Copper Tube Attachment
- 1912
Catalog entry for an Electro Magnet apparatus. "This apparatus was designed to supply our own laboratory with an electro-magnet of sufficient strength and field concentration for magnetizing, experimentation, etc. With…
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Current Electricty: Standard Cells and Dynamo Analysis Apparatus
- 1912
Catalog entries for standard battery cells and a Dynamo Analysis Apparatus, an early example of an electrical generator.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory…
