Pierre Samuel du Pont de Nemours (1739-1817) was a French political economist, writer, publisher, and public administrator. At the onset of the French Revolution, he served as a member of the Assemblée Nationale Constituante, where he allied himself with the moderate Girondist faction. After the leader of the Jacobin movement, Maximilien Robespierre (1758-1794), took power, du Pont was arrested in July 1794, but he escaped execution. On January 3, 1800, accompanied by his sons, he arrived in America. This small collection consists primairly of letters from du Pont de Nemours to Philippe Nicolas Harmand (1759-1839), director of pensions under the Empire, then first clerk for the Public Debt from 1814 to 1821. Harmand was the tutor of du Pont de Nemour's sons and a loyal family friend. Harmand brought du Pont de Nemours food during his period of concealment. These letters include references to financial and business affairs, as well as personal and family news.

Pierre Samuel du Pont de Nemours (1739-1817) was a French political economist, writer, publisher, and public administrator. At the onset of the French Revolution, he served as a member of the Assemblée Nationale Constituante (1789-1791), where he allied himself with the moderate Girondist faction. After the leader of the Jacobin movement, Maximilien Robespierre (1758-1794), took power, du Pont de Nemours was arrested in July 1794, but he escaped execution. In 1800, accompanied by his sons, he arrived in America. His younger son, Eleuthère Irénée du Pont (1771-1834), was a pupil of the chemist Antoine Lavoisier (1743-1794). This small collection consists of two letters to Charles de Pougen (1755-1833) of the Institut de France, as well as a microfilm reel of a selection of letters and documents pertaining to Antoine Lavoisier's trial and execution and du Pont de Nemours' political and intellectual career.

Pierre Samuel du Pont de Nemours (1739-1817) was a French political economist, writer, publisher, and public administrator. These are three photocopies of items related to Madame de Staël. Anne Louise Germaine de Staël-Holstein (1766-1817), known as Madame de Staël, was a writer, philosopher, and politically engaged woman who survived the French Revolution and was exiled multiple times by Napoleon Bonaparte (1769-1821).

Pierre Samuel du Pont de Nemours (1739-1817) was a French political economist, writer, publisher, and public administrator. During the summer of 1771, du Pont de Nemours tutored the son of Carl Friedrich von Baden (1728-1811), Carl Ludwig, Hereditary Prince of Baden (1755-1801). Carl Friedrich von Baden was the Margrave and then later the Grand Duke of Baden, a territory in the southwest of Germany, which at the time was part of the Holy Roman Empire. This collection consists of two microfilm reels and twenty-six photocopies of correspondence between du Pont de Nemours and members of Baden's court--the Grand Duke (Margrave at the time) and the Heredity Prince--pertaining to the activities of Baden's court, economics, and the education of the Heredity Prince.

Pierre Samuel du Pont de Nemours (1739-1817) was a French political economist, writer, publisher, and public administrator. In 1802, he held various government posts under Napoleon Bonaparte (1769-1821). In 1803, he aided President Thomas Jefferson (1743–1826) in negotiations for the Louisiana Purchase, a land deal transferring ownership of more than 530 million acres of territory to the United States from France. The principal item of this collection is a letter to James Monroe, minister plenipotentiary to negotiate the Louisiana Purchase, dated May 7, 1803. The letter is encased in a leather bound portfolio containing the original handwritten French letter, a typed English translation, and three other items.

Pierre Samuel "P.S." du Pont (1870-1954) was an industrialist, entrepreneur, and philanthropist. He was president of E.I. du Pont de Nemours & Company from 1915 to 1919 and chairman of the board of directors from 1919 to 1940. P.S. du Pont was the great-grandson of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Company, and the great-great-grandson and namesake of the French economist Pierre Samuel du Pont de Nemours (1739-1817). During the early 1920s, P.S. du Pont became an active collector of Du Pont materials, and bought several important bodies of manuscripts from French dealers. This collection consists of manuscripts he collected that are primarily concerned with Du Pont de Nemours, the Physiocrats, the French Revolution, and the antecedents of the Du Ponts and allied families in France. The collection also contains the Wilmington & Kennett Turnpike Co. records dating from 1811 to 1921 that were acquired by P.S. du Pont from 1919 to 1920 when he purchased the company's stock, widened the road, and turned over its administration to the Delaware State Highway Department.

Pierre Samuel du Pont de Nemours (1739-1817) was a French political economist, writer, publisher, and public administrator. At the onset of the French Revolution, he served as a member of the Assemblée Nationale Constituante (1789-1791), where he allied himself with the moderate Girondist faction. After the leader of the Jacobin movement, Maximilien Robespierre (1758-1794) took power, du Pont was arrested in July 1794, but he escaped execution. This is a letter from du Pont de Nemours to Félix Faulcon (1758-1843), a former member of the Constituent Assembly, in which he describes his arrest and imprisonment in La Force prison in Paris.

P.S. du Pont (1870-1954) and Louise du Pont Crowninshield (1877-1958) were second counsins and both had an interest in preservation. In the letter, du Pont suggests Eleutherian Mills and Hagley property be preserved as a historic site.

Pierre Samuel "P.S." du Pont (1870-1954) was president of E.I. du Pont de Nemours & Co. (more commonly known as the DuPont Company or simply DuPont) from 1915 to 1919 and chairman of the board from 1919 to 1940. P.S. du Pont was the great grandson of Eleuthere Irenee du Pont (1771-1834), founder of E.I. du Pont de Nemours & Company. He was also an avid collector of documents on the early history of the du Pont family and the DuPont Company. This collection contains elements which were selected from both company and family papers. The material was lodged in du Pont's Wilmington office for a number of years prior to his death in 1954.

The Purchasing Management Association of Central Pennsylvania was a regional chapter of the national trade organization the Institute for Supply Management from 1959 until 2016. The mission and vision of the regional chapter was to educate, develop, and advance the purchasing and supply management profession within Central Pennsylvania. This collection consists of thirty-two bound volumes of original documents from the Purchasing Management Association of Central Pennsylvania, primarily meeting minutes and correspondence between 1959 and 2004.

The Pusey & Jones Corporation were shipbuilders, founders, and machinists of Wilmington, Delaware, which later expanded into papermaking machinery manufacturing. This collection includes nine letters of correspondence to the Pusey & Jones Company and Horace H. Thayer (1878-1959), from J.N. Davis, and from the Pulp and Paper Magazine.

The Pusey & Jones Corporation were shipbuilders, founders, and machinists of Wilmington, Delaware, which later expanded into papermaking machinery manufacturing. The collection primarily contains correspondence between Horace H. Thayer Jr. (1878-1959) and Thomas H. Savery (1837-1910) regarding matters of importance to the company.

The Pusey & Jones Corporation were shipbuilders, founders, and machinists of Wilmington, Delaware, which later expanded into papermaking machinery manufacturing. This collection contains miscellaneous material from the company including financial statements, calling cards, memoranda, and correspondence from Thomas H. Savery (Sr. and Jr.), Eugen Fullner, and A.G. Paine.

William Gouverneur Ramsay (1866-1916) was a civil engineer for railroads and explosives corporations, including Repauno Chemical Company, Great Northern, and DuPont Company. His wife, Caroline “Lena” Johnston Canby (1872-1958) was interested in cultural and educational institutions and traveled extensively. The Ramsay family papers primarily consist of William G. Ramsay's personal and business papers, as well as his family's personal papers which primarily consist of correspondence, much of it between William Ramsay and Lena Ramsay prior to and after their marriage. the letters describe social life in Wilmington, literature, courtship and marriage, household administration, family life, child rearing and health.

Robert Coleman (1748-1825) was one of the most important ironmasters in Pennsylvania and acquired Elizabeth Furnance near Manheim, Pennsylvania. His papers consists of correspondence, receipts, and miscellany, mostly involving land purchase.

Robert Lenox Belknap (1848-1896) was a capitalist and financier of New York City. The Robert Lenox Belknap papers are a fragment saved by his descendants. The papers include Belknap's private letterbooks for the final years of his career (1892-1895), although 33 earlier volumes have been lost. They include both business and personal correspondence and give a good picture of the life of a New York financier of the second rank.

Royal Earl House (1814-1895) was an American inventor who patented an electic telegraph that could print Roman character letters and an electro-phonetic receiver for use in telegraphy. The collection is comprised of twenty-nine letters to House regarding his suit against the Bell monopoly for the phonetic telegraph, from 1885 to 1891.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter is writing to inform an unidentified captain of Naval surgeon John S. Wiley's death.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). These two items are related to his service in the Navy, one a letter concerning his business interests in California, and one report regarding rotten gun breechings.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). Letter, with envelope, from John G. Lawton to du Pont transmitting model of a ship rudder.

Samuel Francis du Pont (1803-1865) was a RearAdmiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The three page letter written to an unidentified colonel discusses the opening of the Crystal Palace in New York as part of the "Exhibition of the Industry of All Nations" World's Fair.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter to Andrew Hull Foote (1806-1863) says du Pont is enclosing autographs of members of the Japanese Embassy, although the enclosures are missing.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. The letter from du Pont to John E. Hoey (1837-1896) concerns the transport of invalid seamen northfrom from the South Atlantic Bloackade Squadron.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter from du Pont to Charles Wilkes (1798-1877) expresses regret over news of Wilkes being court-martialed.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. The letter from du Pont to George H. Stuart (1816-1890) is declining an invitation to speak as a Navy representative at an anniversary celebration of the Christian Commission.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. The letter from du Pont to Navy Officer, Gustavus Vasa Fox (1821-1883) discusses the possibility of saltpeter shortage in the Union in the early years of the Civil War.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter to John A. Dahlgren (1809-1870) is seeking his opinion in regard to a small steam cutter, Altheron, available for purchase.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. The letter to Major General David Hunter (1802-1886) asks for permission to see three deserters from the Confederate States Navy.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter from du Pont to R.C. Winthrop (1809-1894) includes an invitation to visit.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter to Senator James A. Bayard (1799-1880) is upon arrival of the USS Minnesota, which was commanded by du Pont, in Hong Kong.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter from du Pont to Theodore Sedwick (1811-1859) concerning administrative arrangements for an exhibit du Pont was superintendent at the World's Fair in New York.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The collection contains two letters written to Oscar B. Sawyer (1838-1887) and Ben Perley Poore (1820-1887).

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). These five photocopied letters are related to his term in the Navy, four from his time in the Pacific, and one dealing with the South Atlantic blockade during the Civil War.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. Andrew Hull Foote (1806-1863) was a Rear-Admiral in the United States Navy and fought in the Civil War and contributed to several naval reforms prior to the war. This collection consists of two letters, one from Samuel Francis du Pont to Foote in regards forwarding misdirected mail, as both were commanding ships in the China Sea. The second letter is from du Pont's father to a Naval Officer about Samuel Francis du Pont's experience aboard a ship.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). These three photocopy letters are related to his term in the Navy, one from his early career in 1820 and two letters from 1863 during the Civil War.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The collection contains an original letter and photocopies of letters regarding cost for Abraham Hart (1810-1885) publishing an essay by Henry Winter Davis (1817-1865) on the doctrine of intervention and non-intervention in diplomacy and international affairs.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The two letters from du Pont to Charles G. Halpine (1829-1868) are written during the Civil War and relate to ironclads and the evacuation of Charleston, South Carolina.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. The collection contains letters to Joel Turrill (1794-1859) and Joseph Henry (1797-1878). The letters to Turrill are personal in content, referring to their friendship which dated back to 1845 when they both served on the U.S.S. Congress. The letter to Henry references controvery in the Senate involving Henry, likely concerning the Light-House Board.

Samuel Francis Du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). His papers document du Pont's professional and personal life against the background of the pre-Civil War service.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The collection is a microfilmed selection of du Pont's correspondence with contemporaries, primarily Alexander Dallas Bache (1806-1867). The letters concern Civil War activities, especially the use of ironclads in naval operations.

The Crofton and Shubrick families were descendants of a prominent French American diplomat and businessman, Victor Marie du Pont (1767-1827), and represent middle-class American women in the nineteenth and twentieth centuries. This collection primarily consists of the papers of Gabrielle Josephine Crofton (1873-1952) and Mary Ethel Crofton Hunt (1875-1962), daughters of Gabrielle Shubrick Crofton (1835-1894) and Robert E.A. Crofton (1834-1898). It includes diaries, autograph book, notebook, and letters.

The Singer Manufacturing Company was the world's leading producer of sewing machines. It was established in 1851 as the Singer Company, the successor to I.M. Singer & Co. Isaac M. Singer (1811-1875) patented improvements to initial inventions that resulted in the first commercially viable sewing machine. This is a small collection of letters written to the company, primarily from agents, regarding how work has been impacted by the American Civil War (1861-1865).

The Society for the Promotion of Engineering Education, which was founded in 1893 and became part of the American Society for Engineering Education in 1946, was a professional society of engineering school deans, professors, practicing engineers, and industry executives. During the 1930s and 1940s, Dugald C. Jackson (1865-1951), Professor of Electrical Engineering at MIT, served as executive director. MIT president Karl Compton (1887-1954) and Gerard Swope (1872-1957) from the General Electric Company were active members. This collection of correspondence consists largely of letters between Jackson, Swope, and Compton, which document their efforts to shape the curriculum at major engineering schools.

The Soo Hardware Company was a full-service hardware wholesale and retail store located in Sault Ste. Marie, Michigan. It carried a complete line of building materials, plumbing and electrical supplies, stoves and furnaces, major and minor domestic appliances, housewares, sporting goods, and bicycle and auto parts. The records consist of inbound correspondence received between the years 1911 and 1918. The bulk of the correspondence consists of sales letters and invoices from manufacturers and wholesalers, covering the wide range of semi-finished and manufactured goods sold by the Soo Hardware Company. A large number appear to be unsolicited mailings from salesmen, while others document a long working relationship.

The correspondence between Sophie Dalmas du Pont and her husband E.I. du Pont dates from 1792 through 1817. Much of the correspondence was written prior to the family's emigration to the United States in 1799 and contains details of their life in France. The letters include information on child rearing, health and medicinal recipes, and diet. The correspondence documents her domestic responsibilities and supervison of the family's farm and vineyards. The letters, affectionate in tone, express the couple's mutual sadness at being apart and reflect a companionate marriage.

Her papers include three household account ledgers dating from 1819 to 1827, which were used to record expenses for groceries, clothing, and domestic servants' wages. The ledgers also document production at the family's farm. Bills and receipts date from 1803 to 1827, document purchases of groceries, fabrics, and shoes.

Sophie du Pont Ford (1871-1957) was the daughter of Victor du Pont (1828-1888) and Alice Hounsfield du Pont (1833-1904) and the wife of Bruce Ford (1873-1931). The letter indicates Ford is giving a lacquered Chinese-work box to her niece, Greta du Pont Barksdale Brown (1924-2014).

Irene "Sophie" Sophie du Pont May (1900-2001) was a churchwoman, a philanthropist, and a descendant of Pierre Samuel du Pont de Nemours (1739-1817) who founded the E.I. du Pont de Nemours & Company with his son Eleuthère Irénée du Pont (1771-1834) in 1802. The E.I. du Pont de Nemours & Company is a chemical company more commonly referred to as the DuPont company. The collection consists of Sophie du Pont May's family correspondence and financial correspondence as well as correspondence between her father Irénée du Pont (1876-1963) and his older sister Louisa d'Andelot du Pont Copeland (1868-1926).

Sophie Madeleine du Pont (1810-1888) was the youngest daughter of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828), and the wife of Samuel Francis du Pont (1803-1865). The collection contains twelve letters and documents regarding the du Pont family, discussing family and church news, as well as a letter from Samuel B. Brown regarding the Brandywine Manufacturers' Sunday School.

Sophie Madeleine du Pont (1810-1888) was the youngest daughter of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828), and the wife of Samuel Francis du Pont (1803-1865). The letter to Eliza Gardner (Henderson) Jones (1826-1877) concerns family matters and the Civil War.

Sophie Madeleine du Pont (1810-1888) was the youngest daughter of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828), and the wife of Samuel Francis du Pont (1803-1865). The letter from du Pont to Lammot du Pont (1831-1884) concerns the disposal of a book of her husband's on marine artillery.