Abel Wolman was an American inventor, scientist, professor and pioneer of modern sanitary engineering. The papers trace Abel Wolman's active career as teacher, consulting engineer and advisor to local, national, and international agencies and include correspondence, documents, and files documenting his various activities from 1901-1989.

Acheson J. Duncan was born September 24, 1904 in Leonia, New Jersey and was an authority in the fields of industrial statistics and quality control. The collection consists largely of research papers that describe his concentration in the fields of bulk sampling, industrial statistics, and quality control. The collection spans the years 1936 to 1985.

Collection consists of a series of lectures presented by Professor Albert Lanphier Hammond at Hopkins during the spring semester, 1961. The subject of Hammond's lectures was the Theory of Knowledge. The lectures have been transcribed from tape and are available in the typescript. The original tape is included in the collection, but two of the twelve lectures are not available in typescript.

Aleine Austin was historian and author born in New York City, July 19, 1922. The papers, dating from 1940 to 1991, consist of student notes, lecture notes, published articles, manuscript notes, recordings, photographs, correspondence, and a selection of papers that document Aleine Austin's interest and work in the American labor movement.

Allen Weir Freeman was a physician and Johns Hopkins University of Public Health Administration born in 1881, and was brother of the author, Douglas Southall Freeman. Collection consists of letters to and from Freeman family members (dating 1904 - 1907) while Allen Weir Freeman was a medical student and during the start of his career.

Aurel Friedrich Wintner (8 April 1903 – 15 January 1958) was a mathematician noted for his research in mathematical analysis, number theory, differential equations and probability theory. The collection consists largely of Wintner's writings and reprints of his colleagues' work with materials spanning 1848 to 1961.

Benjamin Silliman and Benjamin Silliman, Jr. were both 19th century American chemists and original members of the National Academy of Sciences. The collection spans the years 1816-1871 and consists of 28 autograph letters from both Benjamin Silliman and Benjamin Silliman, Jr., and one eulogy of Benjamin Silliman.

Broadus Mitchell was an educator, historian, and biographer of Alexander Hamilton. Mitchell taught economics at Hopkins, 1919-1939, and was active in political affairs and issues of social justice in Baltimore. The collection consists of some papers related to Broadus Mitchell's research for his published work, William Gregg, Factory Master of the Old South, (1928) and Mitchell's biographical materials. The papers span from 1928 to 1929 and 1979-1986.

Charles Grove Haines was a Professor of Diplomatic History born in Abbottstown, Pennsylvania December 10, 1906. The bulk of the collection consists of correspondence and subject files dating to Haines's time as the Director of the Bologna Center at the School of Advanced International Studies dating from 1970-1976. Some personal items are also included.

Carl Alfred Jacobson (1876-1952) was a scientist and chief editor of The Encyclopedia of Chemical Reactions from 1946 to 1956. The collection consists of diaries dating from 1899 to 1947 and reprints of publications dating from 1908 to 1930. The diaries form the bulk of the collection.

C. Alphonso Smith (1864 – 1924) was an American Professor of English, college dean, philologist, and folklorist. The collection consists largely of clippings from newspapers and periodical regarding the English language and the introduction of slang words used by the military, ranging from 1905-1923.

Charles Howard Carter was born in Baker, Oregon on April 3, 1927. He was Professor of History at Tulane University and a noted specialist on Spanish and European diplomacy in the sixteenth and early seventeenth centuries.

Charles Rockwell Lanman, born July 8, 1850 was a philologist in the late nineteenth and early twentienth centuries. The collection consists of lectures delivered by Lanman while at Johns Hopkins University from 1876 to 1880.

Collection consists of one bound holographic notebook of philosopher and mathematician, Charles S. Peirce. The notebook contains a catalog of books on logic and scholastic philosophy from Peice's personal library. Peirce also noted the estimated value of each title. Most likely, Peirce compiled the notebook, 1880-1881, at a time when he hoped to find a buyer for his library. Most of the books were acquired by the Johns Hopkins University in 1881.

Charles Southward Singleton (1909-1985) was professor of Hispanic and Italian studies at The Johns Hopkins University. Collection is largely research notes dealing with Singleton's later work with some correspondence, family photographs, and awards.

This collection consists of letters and papers of Charles William Emil Miller, professor of Greek at The Johns Hopkins University.

This collection onsists of a 1922 essay by Johns Hopkins University philologist David S. Blondheim, titled "Eassai d'un Vocabulaire Comparatif des Parlers Romans des Juifs au Moyen Age."

José Robles Pazos was an Associate Professor of Spanish at Johns Hopkins University born in 1897 and shot as a traitor by the Spanish Republican Government in February of 1937. The collection spans the years 1929-1940 and consists of correspondence regarding Robles' arrest, a contract for the Spanish translation of 13 books by H.L. Mencken, and two life insurance policies.