Pamphlets; reprints; books; correspondence. The collection consists primarily of unsolicited printed matter and accompanying correspondence sent to Bridgman as a prominent scientist and Nobel Prize winner in physics. Maintained separately by Bridgman, these materials propose alternative, usually extremely unorthodox, theories as to the nature of matter, spacetime, the elements, magnetism, electricity, atomic theory, and the relationship of the Newtonian and Einsteinian views of the universe, including many which concern the concept of the "ether." The collection also contains a small number of reprints and conference proceedings on the topics of metallurgy and nuclear structure.