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…

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…

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…

White metal case with color graphic of two young boys using the Gilbert microscope set. Case opens on a hinge. Inside, a blue styrofoam tray holds a plastic microscope, an electric plug-in light, an objective lens, a…

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…

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…

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…

General view of American chemist Charles C. Price standing in front of a blackboard covered with assorted chemical notations. This photograph was taken at either Osaka University or Kyoto University in Japan, where…

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…

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…

Small, multicolored plastic connectors and straws in small plastic bag.

Models kits, such as this one, are often found in laboratories and classrooms and are used to visualize the structure of chemical substances.

Cardboard box with color printing on lid, showing young men and women engaged in chemical testing of environmental factors (air, water). Inside is a blue plastic tray with wells for test equipment, including a…

Mexican postage stamp issued to commemorate the 40th anniversary of the founding of the Instituto Politécnico Nacional de México (the National Polytechnic Institute of Mexico) on January 1, 1936. Established during the…

Concerning possibility of publishing an early Pauling manuscript in a high school textbook or in an issue of "Chemistry."

Models kits, such as this one, are often found in laboratories and classrooms and are used to visualize the structure of chemical substances.

Periodic table designed in the style of a cube by J. Francis Young, Professor of Civil and Ceramic Engineering, University of Illinois. This table was published by Instruments for Research and Industry and includes…

Green plastic case with snap lid on front; kit comes with five different types of plastic pieces: 12 multi-colored balls, eight gray "double bonds" pieces, one gray "triple-bonded carbon pairs" rod, and dozens of…

Periodic table designed in the style of a pyramid by Charles E. Gragg. This table was published by Instruments for Research and Industry and includes instructions for assembly into a 3-D model.

Transparent plastic container with five interior compartments for multicolored plastic pieces. Instruction manual included.

Models kits, such as this one, are often found in laboratories and classrooms and are used to…

Three dimensional representation of the periodic table of elements (unassembled). ElemenTree is made of transparent Vivak plastic in pink and green with black text. The tree has 17 pieces (layers are polygonal) with a…

In this video produced by the American Chemical Society, two actors from The Fresh Prince of Bel-Air, Alfonso Ribeiro and Tatyana Ali, prepare to attend a new semester at University of California, Los Angeles (UCLA).…

This is a promotional work created by the National Plastics Center and Museum to advertise their educational video, Passing Through. Passing Through is a film for teenagers and high school science students in which a…

The "Periodic Round Table" looks like a multi-layered cake. There are eight wooden layers that sit on top of one another and can be rotated. Layers are divided into chemical elements with engraved element name and…

An instruction manual written to accompany the Smithsonian MicroChemistry XM 5000 chemistry set. Intended for use by children ages 10 and older, the manual describes how to use the set's tools, then outlines a series of…