Modeling kit instruction manual, six unused cardboard sheets containing pop-out pieces representing ions, and a handwritten document found in the pages of the manual signed and dated Herbert T. Pratt, January 2, 1995.
The manual includes five sections: instructions for using the kit, a discussion on atomic and molecular theory, an overview of chemical shorthand, an overview of chemical equations, and instructions for the game "Chemical Dominoes" that users can play with the kit.
Bryan, Arthur Herbert. “How to Use The Chemical Illustrators.” Hagerstown, Maryland: Porter Chemical Company, 1940. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/vxkrjet.
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