Search Results
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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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News from Hugh S. Taylor and Rudolf Ladenburg, September 19, 1939
- 1939-Sep-09
Max Bredig (1902-1977) notes news provided by two men, Hugh S. Taylor (1890-1974) and Rudolf Ladenburg (1882-1952), concerning logistics for his father, Georg Bredig's (1868-1944) immigration to the United States.…
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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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Letter from Max Bredig to Ilse J. Ursell, July 5, 1946
- 1946-Jul-05
Max Bredig (1902-1977) informs Ilse J. Ursell from the Society for the Protection of Science and Learning, that his father, Georg Bredig (1868-1944) was able to immigrate to the United States. Max Bredig thanks Ursell…
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2 items
Letter from Ilse J. Ursell to Paul Homburger, May 17, 1946
- 1946-May-17
Ilse J. Ursell, from the Society for the Protection of Science and Learning, writes to Paul Homburger (1882-1965) asking if Georg Bredig (1868-1944) was able to successfully immigrate to the United States. Ursell…
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Letter from Max Bredig to Charles Siebenmann, December 17, 1938
- 1938-Dec-17
Max Bredig (1902-1977) informs Charles Siebenmann that he has accepted a position at the Vanadium Corporation of America in New York.
- Addressee Siebenmann, Charles
- Author Bredig, Max Albert, 1902-1977
- Subject Bredig, Max Albert, 1902-1977, Siebenmann, Charles
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Letter from Charles Siebenmann to Max Bredig, December 28, 1938
- 1938-Dec-28
Charles Siebenmann congratulates Max Bredig (1902-1977) on his new job in the United States and updates him on the National Research Council in Ottawa.
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3 items
Letter from Charles Siebenmann to Max Bredig, July 5, 1939
- 1939-Jun-28
- 1939-Jul-05 (Received)
Charles Siebenmann writes to Max Bredig (1902-1977), informing Max of his upcoming visit to New York City and inquiring about Bredig's family.
- Author Siebenmann, Charles
- Addressee Bredig, Max Albert, 1902-1977
- Subject Bredig, Max Albert, 1902-1977, Siebenmann, Charles
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Letter from Charles Siebenmann to Max Bredig, August 20, 1939
- 1939-Aug-20
Charles Siebenmann writes to Max Bredig (1902-1977) with his regrets that he was unable to see Max while he visited New York.
- Addressee Bredig, Max Albert, 1902-1977
- Author Siebenmann, Charles
- Subject Bredig, Max Albert, 1902-1977, Siebenmann, Charles
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Letter from Max Bredig to Charles Siebenmann, July 25, 1939
- 1939-Jul-25
Max Bredig (1902-1977) writes to a family friend, Charles Siebenmann. Max expresses his regrets that he missed seeing Siebenmann in person while he visited New York. Max then shares news of his professional life and…
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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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2 items
Letter from Charles Siebenmann to Max Bredig, December 12, 1939
- 1939-Dec-30
Charles Siebenmann, a colleague of the Bredig family, writes to Max Bredig (1902-1977) to express his relief at the news of Georg Bredig's (1868-1944) impending immigration to the United States. Siebenmann worries about…
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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…
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College Spectrometer (Wilson No. 2)
- 1912
Catalog entry for an instrument that measures the wavelengths of light through a chemical sample. Can be used to determine elements in a sample when different elements emit different wavelengths of light. The…
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Letter from Fred S. Weismen to Max Bredig, March 19, 1942
- 1942-Mar-19
Fred S. Weismen, executive secretary of Selfhelf of Emigres from Central Europe, Inc., requests scientific literature from Max Bredig (1902-1977) to supply a scientist colleague living in France with encouragement while…
- Author Weissmen, Fred S.
- Addressee Bredig, Max Albert, 1902-1977
- Contributor Selfhelp of Emigres from Central Europe, Inc.
- Subject Bredig, Max Albert, 1902-1977, World War (1939-1945), Military occupation, Science publishing
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Apparatus for Showing Tesla's Experiments
- 1912
Apparatus for showing Tesla's experiments with electricity.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of laboratory instruments for the physical sciences made by the Central…
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Apparatus for Lecture Table Demontration with Selenium Cells
- 1912
"These cells show the extraordinary property which selenium possesses of changing its electrical resistance under the influence of light."
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog…
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Alternating Current Demonstration Apparatus
- 1912
Apparatus for showing the principles of an induction or alternating current motor and demonstrating the rotating magnetic field.
Part of Catalog K: Physical Apparatus for Universities and Colleges, a catalog of…
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"The Geryk" Mechanical Air Pump for High Vacua
- 1912
Figure depicting "The Geryk" air pump, "an English pump (Fleuss' patents), and a strictly mechanical device with no valves in the usual sense of the word..."
Part of Catalog K: Physical Apparatus for Universities and…
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2 items
Letter from Selfhelp of Emigres from Central Europe, February 19, 1942
- 1942-Feb-19
Selfhelp of Emigres from Central Europe, Inc. was founded in 1936 by German Jews in New York to support new immigrants fleeing persecution in Nazi-occupied Europe. Today, the foundation still exists as Selfhelp…