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48m 37s
Linus Pauling Lectures on Valence and Molecular Structures: Part 3
- 1957
In this third lecture in a series on valence and molecular structure, Pauling addresses ligancy, coordination numbers and complexes, metallic valence, oxidation numbers, hydrogen bonds, and weak forces.
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50m 07s
Linus Pauling Lectures on Valence and Molecular Structures: Part 2
- 1957
In part two of this lecture series on valence and molecular structures, Pauling focuses on ionic and covalent bonds, bond and molecular resonance, and how different bonds effect an element's properties. To demonstrate,…
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50m 41s
Linus Pauling Lectures on Valence and Molecular Structures: Part 1
- 1957
This is the first in a series of three recorded lectures about valence and atomic structure given by Linus Pauling when he was a professor of chemistry at the California Institute of Technology. In this lecture, Pauling…
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71 items
Notes on Water Analysis
- 1950s
Procedures for a series of tests used in water analysis. The experiments include the determination of various minerals and contaminants present in water samples such as nitrite, sulfates, iron, etc. Each contains a list…
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National 4-H Entomology Program exhibition display (circa 1950s)
- 1950s
General view of an exhibition display for the National 4-H Entomology Program sponsored by the Hercules Powder Company. The two individuals visible in the photograph are unidentified.
Formed in 1912 as part of an…
- Creator Of Work Hercules Incorporated
- Subject Hercules Incorporated, Corporations, 4-H clubs, Entomology, Entomology--Research, Science--Study and teaching, Insects
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2 items
Series Sixty student microscope
- 1955 – 1960
American Optical Corporation Sixty student model monocular microscope features American Optical Spencer objective lenses.
American Optical Corporation was a successor to the Spencer Lens Company, founded by Charles…
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Charles C. Price in classroom
- 1950s
General view of American chemist Charles C. Price lecturing in front of a blackboard. This photograph was likely taken at the University of Notre Dame, where he served as Professor and Chairman of the Department of…
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2 items
Gilbert Microscope Set No. 20
- 1938 – 1960
Green wooden case with textured green paper surface; label on front of case features a young boy looking through a microscope and an enlarged image of a dog flea; metal latch opens double-sided interior. 16 glass test…
- Manufacturer A.C. Gilbert Company
- Subject Chemistry sets, Microscopes, A.C. Gilbert Company
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Kosmos Lehrspielzeug [Teaching Toy] 2 All-Chemist
- 1957
Cover features the image of a boy playing with a chemistry set flanked by a man working in an industrial lab; interior has a yellow plastic compartment tray that houses the multiple components of the kit; components…
- Manufacturer Kosmos
- Subject Chemistry sets
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2 items
Skil-Craft No. CA-5 Chemistry Lab Case
- 1950 – 1959
Chemistry sets reached their heyday in the 1950s, but production of them began in the United States during World War I. Playing with a toy chemistry set inspired many a boy to become a chemist, and not until the late…
- Manufacturer Skil-Craft Corporation
- Subject Chemistry sets, Skil-Craft Corporation
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2 items
Porter Chemcraft Chemistry Lab featuring Atomic Energy
- 1950 – 1959
Chemistry sets reached their heyday in the 1950s, but production of them began in the United States during World War I. Playing with a toy chemistry set inspired many a boy to become a chemist, and not until the late…
- Manufacturer Porter Chemical Company
- Subject Chemistry sets, Porter Chemical Company
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Gilbert Chemistry Experiment Lab No. 12006
- 1955 – 1959
Chemistry sets reached their heyday in the 1950s, but production of them began in the United States during World War I. Playing with a toy chemistry set inspired many a boy to become a chemist, and not until the late…
- Manufacturer A.C. Gilbert Company
- Subject Chemistry sets, A.C. Gilbert Company
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Sargent Molecular Model Kit
- 1955 – 1965
White cardboard box with blue writing; contains black, blue, yellow, red, and green spheres as well as wooden and metal connectors.
Models kits, such as this one, are often found in laboratories and classrooms and are…
- Manufacturer E.H. Sargent and Company
- Subject Molecules--Models
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Letter from Farrington Daniels to Theodor Benfey
- 1957-Feb-07
Concerns recommendation of Tom Newlin as a teaching assistant as well as plans for revising the Chemistry program at Earlham College. The last paragraph makes references to the current state of development of solar…