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Comprising the years 1934 to 1954, Vincent Schaefer's research notebooks are bound volumes containing handwritten observations, formulas, and drawings from his scientific endeavors. They comprise their own subseries partly due to the fragile nature of the bindings, covers, and paper itself, but also because the nature of the bound books prevents their being divided among the categories of snow and ice research, cloud seeding, general research, etc. Researchers are encouraged to consult these notebooks for information on Schaefer's World War II projects, cloud seeding, surface chemistry, and more. Please note that Schaefer kept two sets of notebooks from 1940 to 1943—in addition to the larger hardback notebooks, he also kept a set of small softcover books that dealt with very specific topics such as smoke filters and artificial fog. He also used some of the smaller-size notebooks for scientific observations from his own home.

Schaefer's correspondence files are arranged alphabetically by subject. They include letters sent and received by Schaefer as well as some to and from Irving Langmuir. Schaefer also retained letters that were to and from others at General Electric but carbon copied to him. While most of Schaefer's letters came to the archives grouped in large, general batches, some were retained separate from the larger groups. The archivist kept that arrangement, which is why certain letters are foldered individually or in very small groups while the majority of this subseries is simply categorized as "general".

The Diaries and Travelogues subseries consists primarily of travelogues documenting several school field trips and family vacations. The diaries document aspects of Studer's personal landscape, and were kept sporadically.

This series contains early publications by Brecht during his years in the Reich Ministries and the Reich Chancellry, as well as manuscript material to his later publications. The bulk of this sub-series is comprised of materials dealing with his major publication, Political Theory: The Foundations of Twentieth Century Political Thought, first published in 1959 in English, reprinted editions, and the translation into German. This includes text materials, reviews and correspondence between Brecht and his publishers.

This series contains Brecht's contributions to newspapers and periodicals, as well as individual chapters in books. Included in this series are early writings in German, including several literary pieces. Although many of the typescripts are present only in photocopies, original newspaper and magazine clippings or reprints of the majority of published pieces are present in this series.

The Schaefer subject files are a collection of brochures, notes, and other ephemera that have enduring value but do not belong in other categories such as cloud seeding or snow and ice research. These files include research notes from sources other than General Electric; scientists and entrepreneurs frequently exchanged results of their work with one another, but to avoid confusion, the work of Schaefer and other G.E. scientists can be found in the next subseries while informal research notes and observations by others are located here.

This subseries consists of a collection of materials by local, state, and national activist groups and coalitions, particularly those involved with pesticides or some other environmental / health issues. Some worked closely with NYCAP, while in other cases it was not clear. Included are materials produced by these groups, and well as NYCAP's correspondence with them.