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Correspondence and other papers dealing with departmental plans, reviews and organization, buildings and laboratories, staff recruitment, research, impact of World War I and personal affairs of various staff members especially when they were studying in Europe. Correspondence includes letters of John W. Langley, Robert A. Millikan, Harrison Randall, James M. Cork, Ernest Lawrence, Walter Stevens, John O. Reed, Henry Carhart, Karl Guthe, Fred Hodges, Horace R. Crane, and others. Also includes correspondence of chairmen Daniel Sinclair, Richard H. Sands, and Lawrence W. Jones. Efforts to locate a superconducting super collider in Michigan in the 1980s are well documented in these records.

The Department of Physics records contain budget sheets, clippings, committee minutes, correspondence, departmental review reports, organizational charts, personnel records, and photographs. The records are most informative in the administrative proceedings of the department. They are least informative in curricular and research areas. The records span the years 1873-1995 and are arranged into four series: Administrative Files, Undergraduate and Graduate Programs, Research, and Awards and Special Events and L3 Project. Although there are 19th century records present, the bulk of the records cover the period from 1954 to 1991.

The Dering Family papers contain correspondence received by Thomas Dering, a New York State congressman, and other members of the Dering family. Several letters are from Nathaniel Ray Thomas (d. 1791), a Loyalist from Massachusetts, and his wife, Sarah Dering Thomas; these concern both personal and business matters. Also included are letters from Republican Congressman and Sag Harbor resident Ebenezer Sage.

The Dering Family papers contain 133 correspondence received by Thomas Dering and other members of the Dering family, as well as 1 book, 1 newspaper clipping, and 1 photograph. 20 letters are from Nathaniel Ray Thomas (d. 1791), a Loyalist from Marshfield, Massachusetts, to Thomas Dering at Boston. 16 of these are dated 1755, and discuss business dealings and family affairs. Thomas's wife, Sarah Dering Thomas, wrote approximately 10 letters to Thomas and 15 to her nephew Sylvester between 1755 and 1800. These concern family life, hardships suffered from maintaining loyalist sentiments during the American Revolution, her ongoing health issues, and difficulties encountered in Nova Scotia after the war. In a letter dated April 16, 1800, to Sylvester, she commented on British and French interference of U.S. shipping and trade.

The collection contains 50 letters from Ebenezer Sage to his friend Henry Dering in the period 1806-1815, from Sage’s time in Washington, DC. Sage described his experiences in Congress: committee meetings, legislative updates, foreign affairs, and the social scene in Washington, DC. In particular, he discussed the debate on the national bank, the war hawks in Congress, efforts to have gun boats defend Sag Harbor, reports of enemy fleets off the Potomac, and news of the American victory at New Orleans in 1815. One letter by Ebenezer Sage gives an account of a reception for First Lady Dolley Madison (February 21, 1810). Additional letters are from Sage's daughter, Frances Mary Sage, to her friend Frances Dering. The letters convey a strong friendship between the women and their desire to spend time together. A letter from November 28, 1813, contains a drawing of a bouquet by Frances Sage.

The Thomas and Dering families were friends with the influential Nova Scotia residents, John and Frances Wentworth. Several letters reference their visits in Nova Scotia, and a letter from Sarah Dering Thomas to Elizabeth Gardiner mentions Sir John Wentworth being appointed governor of Nova Scotia (1792). In one letter to Thomas Dering, dated January 6, 1784, Lady Frances Wentworth (in New York City), enclosed a newspaper announcement for her wedding in 1769. In this letter, she wrote about the difficulty of finding a ship to take her away from New York City during the British occupation. The Dering Family Papers also include a postcard of John Singleton Copley's portrait of Frances Wentworth from the Lenox Collection of the New York Public Library (enclosed in Wentworth’s 1784 letter).

This collection contains A Sketch of Dr. John Smith Sage of Sag Harbor, N.Y., a book by Anna Mulford, published in 1897 in Sag-Harbor by J.H. Hunt. The book includes a biographical account of John Sage, and mentions members of the Dering family. It also contains “some interesting letters of his father, Dr. Ebenezer Sage, written in the early part of the century, and other matters relating to Sag-Harbor.”

Descriptions of Oyster Survey Signals, State of New York is a two-volume survey of signals located along the north coast of Long Island in the 1880s and early 1890s. The volumes contain descriptions of each signal (written by multiple individuals), drawings, and maps.

Descriptions of Oyster Survey Signals, State of New York (600 pages, not all of which are used) is a two-volume survey of signals located along the north coast of Long Island in the 1880s. Each volume is 300 pages long and has a title and the names of Eugene G. Blackford and W. G. Ford., Jr., stamped in gold on the front cover. Together, the volumes comprise a survey of many oyster signals, arranged alphabetically by name.

Most descriptions are dated 1881-1887, but the commission revisited some signals as late as 1892. Each entry contains a detailed description of a signal's location and composition (painted poles, flags, etc.). Some entries note the signal's distance from nearby towns or its location along bays and inlets. Manuscript maps and drawings of signals and their locations are present throughout the volumes. Descriptions are attributed to various persons, including J. P. Bogart, G. Bradford, W. C. Hodgkins, Charles Hosmer, I. C. McCorkle, J. A. Sullivan, C. H. Van Orden, and Charles Wyeth. Each volume contains a print of a tripod signal topped with flags.

Successor to the Land Department of the Detroit, Mackinac & Marquette Railroad Company, owner of large land holdings in Michigan's Upper Peninsula. Timber surveys, applications to purchase company lands, and tax records.

The record group consists of three kinds of record volumes: Timber surveys; Applications; and Tax books.

The Detroit News was a prominent daily newspaper founded by James Edmund Scripps in 1873. The success and expansion of the paper is largely attributed to Scripps' son-in-law, George Gough Booth. The collection contains photographic materials including glass plate negatives, film negatives, and photographic prints of various sizes as well as scrapbooks of newspaper clippings from the Detroit News.

The Detroit News records, 1856-1991 (164.5 linear feet) consist of photographic materials including glass plate negatives, film negatives, and photographic prints of various sizes as well as scrapbooks containing newspaper clippings from the Detroit News. The arrangement of the collection is alphabetical and maintains original order as far as could be discerned. In instances where multiple formats were stored together, they have been rehoused separately for preservation purposes. Researchers are encouraged to review the entire container list of this finding aid to identify corresponding materials of different formats within the collection, which have been indicated.

The researcher will find that a significant portion of the photographic materials depict interior and exterior views of the Detroit News building designed by Albert Kahn and erected in 1917. Additional topics of photographic materials include the radio station, WWJ and various events hosted by the News. Images of the Scripps and Booth families as well as employees of the Detroit News are also present among the collection. The scrapbooks contain newspaper clippings, which present a broad range of subject matter as covered by a daily metropolitan newspaper. All of the glass plate negatives and a selection of film negatives have been digitized and can be viewed by following the links in the container list of this finding aid.

The Detroit Observatory, an astronomical observatory on the campus of the University of Michigan, was the vision of University of Michigan President Henry Philip Tappan. He recognized the need for institutions of higher education to pursue scientific endeavors. Built in 1854, the Detroit Observatory was named after the Detroit residents who helped finance the building project. Extensive restoration work of the Observatory was completed in 1999.

The Detroit Observatory record group includes administrative materials of the Observatory's later years (post-1994), including documentation on the Observatory's restoration project and materials encompassing the Observatory's publicity and outreach efforts. The collection also contains various historical documents and artifacts such as logbooks and records, photographs and other visual materials, motion pictures, architectural drawings, and publications. The collection includes all of the documents, artifacts, and records transferred to the Bentley Historical Library in 2005. Materials not physically transferred to the Bentley that remain in the Observatory (such as telescopes, clocks, and associated astronomical devices) have not been identified here, but documentation can be found listed in the various inventories and databases found in the administrative series.

This collection contains the following series: Administrative, Publicity and Outreach, Research, Historical, and Publications.

The Detroit Streetcar Collection documents the history of passenger rail transportation in the Detroit, Michigan metropolitan area during the late-19th century until the mid-20th century. The collection consists of photographs, correspondence, maps, articles, streetcar rosters and equipment reports, and newsletters. Photographs make up the majority of the collection and depict urban street scenes, streetcars in use and stationary streetcars, and route construction.

The Detroit Streetcar Collection documents the history of passenger rail transportation in the Detroit, Michigan metropolitan area. The collection consists of photographs, correspondence, maps, articles, streetcar rosters and equipment reports, and newsletters. Photographs make up the majority of the collection. The photographs include depictions of urban street scenes, streetcars in use, stationary streetcars, specialized equipment, constructions of rail lines and bridges, repair shops and train yards, and disassembly and former routes. Research contains materials documenting various streetcar types, equipment and parts, routes, timelines, and maps. Published materials include articles and newsletters, advertisements, and flyers and brochures.

The Detroit United Railway (DUR) and the Detroit Department of Street Railways (DSR) are the main transportation services depicted in the collection. Railroads spanning the state of Michigan are also represented in the collection, as are other forms of public transportation such as buses and trolleys.

Collection of correspondence belonging to De Witt and Sarah Clarke, who were residents of Battle Creek, Michigan during the Civil War. Bulk of collection consists of letters Sarah sent De Witt from Michigan while he was serving in the 2nd Missouri Cavalry. Remainder of the collection includes personal correspondence with other family members and friends as well as De Witt's business correspondence. Bulk of business correspondence dates after De Witt relocated the family to the developing town of Le Mars, Iowa in 1871, where he was a prominent merchant and community leader.

The collection consists of Sarah and De Witt Clarke's personal correspondence and De Witt's business correspondence. The bulk of the collection consists of letters from Sarah to De Witt, written from Michigan while De Witt was away with Merrill's Horse in Arkansas and Tennessee from 1864 to 1865. In her letters, Sarah expresses anxiety for her husband, reports on home and family life, and describes caring for their child in his absence. The collection includes De Witt Clarke's letters to his wife and personal correspondence with other family members and friends during and after the war. De Witt Clarke's business correspondence dates from after the Civil War and includes receipts, ledgers, price lists, notices, and advertisements, as well as correspondence with typewriter manufacturers in New York and Ohio.

Also included in the collection are typewritten transcriptions and lists of letters compiled by Anne Meis Knupfer.