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The Naghel exercise book, entitled Cahier de navigation, is a mathematical workbook on the art of navigation. The volume once belonged to Captain Francis Naghel, and includes documents and correspondence related to two of his descendants.

The Naghel exercise book (162 pages), titled Cahier de navigation, is a mathematical workbook on the art of navigation. The volume once belonged to Captain Francis Naghel, and includes documents and correspondence related to two of his descendants.

The navigational instructions comprise 143 pages of the volume. Individual sections often pertain to a rule with related examples and mathematical problems that often require fairly complex solutions. The volume covers specific topics such as plotting navigational courses, determining one's position, and using nautical instruments to establish direction and location. Many of the examples show practical applications and are illustrated by geometric figures or drawings of related nautical tools, and some also contain relevant charts.

• Compass (p. 47)
• An oblique sphere showing signs of the zodiac, with a picture of a small rowboat in the lower left corner (p. 73)
• Navigational problem illustrated by a half-globe and two sailing ships (p. 127)

The final 19 pages consist of pasted-in documents pertaining to Naghel and two of his descendants. These are a document certifying Naghel's American citizenship, dated June 12, 1806; a letter to Naghel's wife from her brother, Emanuel West (October 21, 1825); and documents that relate to Edward Q. Naghel, a dentist from New Albany, Indiana, and to Charles E. Naghel, a Marine commended for his work with the 1930 census in Alaska. The volume is bound in vellum.

In this book, a traveling New England schoolteacher recorded instructional exercises, instructional explanations, poetry, and biographical information about pupils. The author taught in New Hampshire and present-day Maine. Subjects of instruction include arithmetic, surveying, geometry, nautical navigation, and writing.

A traveling New England schoolteacher recorded instructional exercises, instructional explanations, poetry, and biographical information about pupils in this volume (220 pages, 8" x 12") between 1787 and 1811. The author taught in New Hampshire and present-day Maine and entered personal information about teaching appointments throughout the volume. Individual lessons are dated as early as 1787, and the volume includes several lists of male and female pupils from teaching engagements in various towns, dated as late as 1811. Some lists of students are accompanied by the students' birthdates. Classes convened in schoolhouses, other public structures, and private homes.

Each page has a subject label, and several pages are comprised of miscellaneous questions entitled "A Collection of Questions," occasionally attributed to The London Magazine. Much of the volume pertains to instruction in mathematical subjects such as algebra, geometry, and trigonometry, and it includes diagrams, examples, and practical applications. Lengthy sections are devoted to surveying and nautical navigation (including "plane-sailing"), often with many diagrams. Other sections concern subjects such as writing and history, with examples of proverbs, deeds, marriage licenses, and letters for copying. Some pages have collections of anecdotes, proverbs, and poems, usually pertaining to morality and religion. A number of lengthier poems concern death and weddings, and one is entitled "Rodgers & Victory[:] Tit for tat. Or the Chesapeake paid for in British Blood!!!" Other parts include a cure for jaundice, a "rebus," a table of symbols for astronomical objects, information about "Occult Philosophy or Magic," instructions for gauging a copper kettle and a man of war, and a list of nouns with corresponding verbs and participles. Some of the material is copied from outside sources, such as John Love's Geodesia.

The Nimrod and Thomas Clark family collection contains correspondence, legal documents, financial records, and other items related to the Clark family of Montgomery County, Georgia. Some items pertain to slave labor.

This collection (78 items) is made up of correspondence, legal and financial records, and other items related to the Clark family of Montgomery County, Georgia.

The Correspondence series contains 27 letters between members of the Clark and Purvis families. The first item is a 1-page letter that William S. Clark wrote to his father while serving with a military unit on Jekyll Island, Georgia, in January 1861. Margaret Clark also received a letter from a nephew about his life in Patroon, Texas, in April 1882, as well as letters from nieces and nephews about their lives in Seward, Georgia. The letters from 1885-1887 largely concern Thomas R. Clark's legal difficulties after he shot a member of the Troop family, an African American family who lived near the Clarks. His mother, who hoped that the case could be settled out of court, offered advice and later reported to relatives that the matter had cost him $60. Margaret and Thomas Clark also received letters from members of the Purvis family. The final item is a letter that Alma Clark wrote to Ellen Murray in April 1939.

The Legal Documents series (23 items) contains contracts and other documents related to the Clark family and to land in Georgia. Ten indentures and deeds are dated before 1853, mainly in Telfair County, Georgia; one includes a sketch of a plot of land in Wilkinson County, Georgia (June 20, 1807). Four items relate to African American laborers who worked for Nimrod Clark, including 2 receipts for the sale of a female slave (October 16, 1844, and October 10, 1853). Nimrod Clark and Mary Clark, a "freed laborer," made a contract in April 1866, and a judge apprenticed Caroline Clark, an 11-year-old African American girl, to Nimrod Clark in December 1866. Other items pertain to Georgia property and to Lewis P. Allard's discharge from the United States Army (June 9, 1865).

Financial Documents (17 items) include 3 Confederate war bonds (1862-1864), 13 receipts pertaining to members of the Clark family, and a small hand-bound volume with undated accounts and genealogical notes about members of the Clark family.

The Portraits and Photographs series (4 items) contains a drawn portrait of a soldier, a tintype print of a soldier, and two cartes-de-visite of Abraham Lincoln and his family.

The Ephemera series (7 items) includes 2 buttons from the "Dragoons Infantry" (1860), printed pages from a Bible class curriculum, and a school copybook.

This collection is an undated 53-page manuscript, containing portions of the English translation of a work of organ music theory and practical application by German organist and instructor Wilhelm Schneider. The manuscript's first page corresponds to page 87 of Schneider's Practical Organ School . . . to which is added a complete Treatise on Harmony and thorough Bass. Translated and Adapted to the wants of Young Organists (Boston: Oliver Ditson & Company, 1851). Afterward, the manuscript follows a different organization from the printed work—chapter one of the manuscript corresponds, for example, to chapter two of the published version. A comparative analysis has not been completed, though a cursory review suggests that the manuscript has textual and possibly other variations from the published version.

This collection is an undated 53-page manuscript, containing portions of the English translation of a work of organ music theory and practical application by German organist and instructor Wilhelm Schneider. The manuscript's first page corresponds to page 87 of Schneider's Practical Organ School . . . to which is added a complete Treatise on Harmony and thorough Bass. Translated and Adapted to the wants of Young Organists (Boston: Oliver Ditson & Company, 1851). Afterward, the manuscript follows a different organization from the printed work—chapter one of the manuscript corresponds, for example, to chapter two of the published version. A comparative analysis has not been completed, though a cursory review suggests that the manuscript has textual and possibly other variations from the published version.

The Zaccheus Brown notebook contains information compiled between 1782 and 1783 on arithmetic, sailing and navigation, and surveying, as well as a log of the Phoenix's voyage from New Jersey to the Virgin Islands in 1789. Mathematical and navigational problems are often illustrated with diagrams, and the volume also contains an example of a Mercator chart of the Caribbean.

The Zaccheus Brown notebook (175 pages) contains information on arithmetic, sailing and navigation, and surveying, as well as a log of the Phoenix's voyage from New Jersey to the Virgin Islands in 1789.

The first 112 pages, compiled from 1782-1783, are comprised of information about mathematics and sailing and contain a brief ship's log. Mathematical subjects include square and cube roots, geometry, and plane trigonometry; Brown copied and solved mathematical problems, which are often illustrated with diagrams. Instructions for aiming cannons appear in the section about trigonometry. Brown also described sailing methods such as plane, traverse, oblique, Mercator, parallel, middle latitude, and current sailing, as well writing instructions for turning a ship windward and for determining location. The parts of the volume concerning sailing also contain problems, diagrams, and an example of a "Plane Chart" and "Mercator's Chart." The Mercator's chart shows the locations of islands in the northern Caribbean Sea. The notebook's other subjects include the compass, calculating the phases of the Moon, and the Gregorian calendar. A final section pertains to surveying.

Zaccheus Brown's notebook also contains logs concerning the voyage of the Endeavour (9 pages) and the schooner Phoenix (58 pages). The Endeavour log, attributed to "L. H," notes the ship's journey "from the Cape" in late June and early July 1783. The Phoenix log details Brown's voyage from June 17, 1789-September 1, 1789 from Salem, New Jersey, to the Virgin Islands and back to Virginia. Some of Brown's daily entries about his voyage on the Phoenix include charts recording the ship's course and position, along with additional remarks on wind speed and direction. Brown occasionally discussed other aspects of his voyage, such as the pidgin language spoken by the ship's Dutch crew and his premonitions after bad weather and delays. He also described the port and the island of Saint Thomas, a Dutch colony (currently part of the United States Virgin Islands).

The volume contains illustrations of a man in the sun, a compass rose, and a fish and man; the latter drawings are flourishes on the heading for the section of the book on cube roots. The back endpaper includes a table of angles related to navigation.