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8 items
Klett Bio Colorimeter
- 1929
Klett Bio Colorimeter, a device used in colorimetry to measure the absorbance of particular wavelengths of light by a specific solution. Colorimeters are commonly used to determine the concentration of a known solute in…
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2 items
Hand Operated Centrifuge
- Circa 1930
Brass instrument with removable wooden handle. Holds two centrifuge tubes. Used for rapid settling of suspended solids from small quantities of liquid in analytical or clinical procedures. Manufactured by Charles Lentz…
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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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Naumann in the physical chemistry lab in Leipzig
- Circa 1900
Sepia-toned and annotated photograph of two men, one identified as "Naumann," at the physical chemistry department of Leipzig University. Behind the men are shelves with glassware.
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2 items
Chemists at University of Leipzig, 1892
- 1892
Black and white photograph depicting a group of chemists posing with glassware in a laboratory at the University of Leipzig in 1892. A handwritten caption on the back of the photograph identifies those pictured as "Dr.…
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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…
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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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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…