Finding Aids

The Haskell Laboratory was established in 1935 as a Dupont Company research laboratory tasked with identifying potential health risks that could result from DuPont products and processes. DuPont called the laboratory the first of its kind in the United States, and the lab grew to become a respected and influential leader in the fields of occupational safety and toxicology. The records in this collection provide insight into the early motivations for creating the lab. In addition, the various papers, records, and publications document the laboratory’s research interests, business operations, and human resources activities.

The Heintz Manufacturing Company was originally organized by Leo Heintz in Philadelphia in 1921. The firm initially manufactured all-steel pre-assembled truck bodies but later expanded to produce a wide range of pressed sheet-metal products. The records primarily focus on the company’s contractual obligations with the US Navy during World War II; employee retirement and pension plans; descriptions of various welding processes and tools, and material related to the licensing of cold welding under the trademark, "Koldweld."

Helen Baker Cushman (1922-) was the founder and manager of H.M. Baker Associates, consultants in business archives and records from 1958 to 1993, headquartered in Westfield, New Jersey. Her papers consist primarily of correspondence with clients and potential clients; notes, drafts, and printer's mechanicals and negatives for her publications; data files created in the course of her work; and some business publications and ephemera.

Helen Sellers Garrett (1857-1946) was one of Wilmington's pioneer businesswomen and served as president of the Labor Commission of Delaware. She was the daughter of one of the Edge Moor Iron Company's founders and granddaughter of abolitionist Thomas Garrett (1789-1871). The collection contains a carbon typescript report of the lawsuit of Helen S. Garrett vs. Edge Moor Iron Company, including financial statements.

The Hendrick Manufacturing Company was the nation's largest manufacturer of perforated screens. The company was founded by an inventor and entrepreneur, Eli E. Hendrick (1832-1909) in 1885 in Carbondale, Pennsylvania and remained in the hands of Hendrick's descendants until the 1980s, when it was sold. Hendrick's business ventures also included refining lubricating oils and cold storage refridgeration for argricultural produce. This collection consists of records detailing businesses founded by Hendrick and his descendants, including lubricating oil, refrigeration, and metal perforation, especially the Hendrick Manufacturing Company.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The collection consists of five letters from du Pont to Gustav Schelle (1845-1927) and one from Schelle. The letters mostly express personal friendship and deal indirectly with Schelle's writings on the Physiocraps and du Pont de Nemours.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. Two typed letters from du Pont to J. Simpson Dean (1898-1978) and Paulina du Pont Dean (1903-1964) concerning the new private road beginning at the intersection of the two private roads to Eleutherian Mills and Nemours residences.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. On November 10, 1915, du Pont was honored with a dinner put on by the younger men of the family. The collection includes a mailing list for a booklet to commemorate the dinner, along with a booklet which lists those attending, describes the presentation of the gift, and includes the remarks prepared by du Pont.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The letter from du Pont to Benjamin W. Austin (-1898) secretary of Trinity Historical Society in Dallas, Texas from 1885 to 1894, expressing thanks for honor conferred by "your Association."

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The letter from du Pont to F.G. [Frederick G.] Larned (1860-1937) of Poland, New York, explains the position and duties of the man he wishes to employ on his farm at Winterthur.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. In February 1889, du Pont wrote General James H. Wilson (1837-1925) about certain Civil War battles and their mutual commander (at different times) George Crook (1828-1890).

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The collection contains a letter du Pont wrote to Howard M. Jenkins (1842-1902), editor of Friends intelligencer (Philadelphia) concerning the nomination of John Hunn (1849-1926) as the Republican candidate for governor of Delaware.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. On July 21, 1896, du Pont wrote a letter to John C. Higgins (1838-1924) congratulating him on his nomination for Governor of Delaware for the Republican Party.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The collection contains two photocopied letters of du Pont to President Benjamin Harrison (1833-1901) concerning the Republican Party in Delaware prior to the state elections.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The collection contains two photocopied letters from du Pont to Daniel Ammen (1820-1898), a Naval officer and Chief of the Bureau of Navigation.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The leather-bound scrapbook serves as a testimonial to the memory of du Pont. It includes records of the West Point class of 1861, the military record of du Pont, his award for gallantry in action, his obituary from the DuPont Company annual report, and photographs of H. A. du Pont and scenes of West Point in 1861 and 1961.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The collection contains miscellaneous material related to du Pont, including a letter, Christmas cards, invitation to meet the Representatives of the Societies of the Cincinnati, and invitation from the Secretary of the Navy to the unveiling of the statue of Samuel Francis du Pont (1803-1865).

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The collection consists of a photocopy of du Pont's will, dated September 5, 1923, and a codicil of January 5, 1926.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The collection consists of a survey and two letters related to du Pont's Deep Water Point Farm in Salem County, New Jersey.

Henry A. Janvier (1861-1952) was an engineer with the Ferracute Machine Company of Bridgeton, New Jersey, where he had begun work in 1877 as a sixteen-year-old apprentice. Sometime in 1896, Ferracute signed a contract with the Chinese government to build three mints there, two at Wuchang in Hopei Province and one in Chengtu in Szechwan. Janvier served as chief engineer for the project. This collection includes Janvier's letters to his family, in which he describes his 1897 trip to China.

Henry Belin du Pont (1898-1970) was a research engineer with General Motors and the vice president of E.I. du Pont de Nemours & Company from 1939 to 1963. This collection contains correspondence from several generations of the family from the early nineteenth through the twentieth century, including Francis Gurney Smith (1784-1873), Elizabeth (Eliza) MacKie Smith (1787-1861), Joanna Smith du Pont (1815-1876), Frances du Pont Coleman (1838-1902), Eleuthera "Ella" du Pont Bradford (1848-1906), Eleuthera Bradford du Pont (1873-1953), Alicia Bradford Maddox (1875-1920) and Phoebe George Bradford (1794-1840).

Henry Bower Chemical Manufacturing Company was a chemical manufacturing company that primarily produced ammonia. The company was formed in 1906 by the merger of three existing companies. The records include account books, production records, sales records, and inventories.

Henry Bower Chemical Manufacturing Company was a chemical manufacturing company that primarily produced ammonia. The company was formed in 1906 by the merger of three existing companies. These records include account books, production records, sales records, and inventories.

Henry Disston & Sons, Inc. was a major manufacturer of saws and other woodworking tools and one of the largest industrial firms in Philadelphia. The Henry Disston & Sons, Inc. had a number of subsidary companies, these records contain a small number of account books from only three of the firms subsidaries. There are accounts for: the Tacony Fuel Gas Company, the Henry Disston & Sons File Company, Limited, and the Henry Disston & Sons Iron & Steel Works, and an insurance ledger from the Estate of Henry Disston.

Henry du Pont (1812-1889) was an American military officer and son of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828). The collection contains two photocopied letters to du Pont, one from his nephew, James Irenee Bidermann (1817-1890), and the other letter from his sister, Sophie Madeleine du Pont (1810-1888).

Henry du Pont (1812-1889) was an American military officer and son of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828). In the letter to James C. Aiken (1806-1884), du Pont agrees to sign a letter of recommendation for a political appointment to president-elect Grant (1822-1885).

Henry du Pont (1812-1889) was an American military officer and son of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828). In 1854, du Pont wrote a letter to Senator John M. Clayton (1796-1856), requesting assistance in securing an appointment for his son, Henry A. du Pont (1838-1926), to the United States Military Academy at West Point.

Henry du Pont (1812-1889) was an American military officer and son of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828). The collection is comprised of photocopied of typescript copies of letters of du Pont to and from his family.

Henry du Pont (1812-1889) was an American military officer and son of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828). The collection consists of photocopied letters from Henry du Pont (1812-1889) and typescript of Pierre Samuel du Pont de Nemours (1739-1817) autobiography he wrote in 1792. The letters are from sisters Eleuthera du Pont Smith (1806-1876) and Sophie Madeleine du Pont (1810-1888), as well as William Tecumseh Sherman (1820-1891) and M. Saito of the Japanese Navy.

Henry du Pont (1812-1889) was an American military officer and son of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828). In the year before he died, du Pont released a mortgage he held to Anna B. Stidham (1854-1918) for land in New Castle County, Delaware.

Henry du Pont (1812-1889) was an American military officer and son of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Co., and Sophie Madeleine Dalmas du Pont (1775-1828). The papers relating to du Pont's enrollment and time at the U.S. Military Academy at West Point, including letters from Callender Irvine (1775-1841), Peter B. Porter (1773-1844), E.I. du Pont (1881-1834); du Pont's obituary as published in the 1890 annual reunion of the Association of Graduates Office at the Academy; and a roster of the West Point class of 1833.

The Henry family were armsmakers who operated a family gun manufactory in eastern Pennsylvania for five generations. The records of the Henry family document the line leading from the first William to Granville, with some records of William, III. The main body of records deals with the operation of the Boulton Gun Works, its predecessor operation at Nazareth and the associated gun shop and store in Philadelphia.

Henry Hemmendinger was one of the preeminent color scientists of his day. Hemmendinger's papers represent the span of his career and includes contributions from a variety of individuals and organizations working the field of color science.

Henry J. Burt (1895-1970) invented a batting and pitching apparatus known as the "Pitchin' Pete" in the 1960s. Burt was a research professor at the University of Missouri and a clergyman in Newfields, New Hampshire. This small collection illustrates the U.S. patent application process for Burt's invention. In September 1963, Burt met with patent attorney Norman S. Blodgett (1921-1991) and engaged his services in patenting his batting and pitching apparatus. The collection consists of correspondence between Burt and Blodgett regarding the patent application process, billing, licensing, and product specifications. The batting and pitching practice apparatus patent is included in the collection, along with Burt's drawings, prior art, and product figures. This collection would be useful to those interested in how a product concept develops from ideation through patent protection to manufacturing.

Henry Miller (1845-1926) was first employed at the Brandywine Works of E.I. du Pont de Nemours & Company. In 1922, he was one of the oldest surviving employees when he was interviewed by Alfred I. du Pont (1864-1935). In the interview, Miller describes the layout of the Brandywine Works as it changed over time, as well as the various apparatus and processes used in the manufacture of gunpowder and its constituent ingredients.

Henry S. Leverich (1804-1885), along with his brothers, was a merchant and financier in New York City. The checkbook contains annotated stubs for checks drawn on the Merchants' Bank in the City of New York and several blank checks.

Herbert Belar (1901-1997) was an inventor and research scientist in the field of acoustical engineering at the RCA David Sarnoff Research Center in Princeton, New Jersey for thirty-eight years. He developed "hi-fi" recording, the phonetic typewriter, and the electronic music synthesizer. This small collection of Herbert Belar papers reflects the professional daily work of an acoustical engineer from the 1930s through the 1960s. There is significant documentation on the phonetic typewriter, the 200 speech communication system, the music composing machine, and the electronic music synthesizer. Notable inclusions are information related to the development of "hi-fi," film motion pictures sound recording, and phonographic records recording. There is only one file that discusses Belar's work at the MAD Laboratory.

Herbert James Tily (1866-1948) was bookkeeper, auditor, chief accountant, and then general manager of Strawbridge & Clothier. He organized the Strawbridge & Clothier Chorus of store employees. The miscellany collection contains news clippings and ephemera describing Tily's work at Strawbridge's, with the Chorus, and in civic affairs. Additionally, there is a copy of the sheet music for "The Slave's Dream," a musical setting for a Longfellow poem.

Hercules Inc. was a manufacturer of chemicals and munitions based in Wilmington, Delaware. The records consist of a sample of employee personnel records, or service record cards, that date from circa 1914 to 1933, as well as copies of the company pension and retirement savings plans that date from 1982 to 1990. The cards typically contain information on personal characteristics, such as race, ethnicity, age, physical appearance, and family, and also on occupation, wage rates, promotion, discipline, and reasons for discharge. The plants are scattered around the country and thus provide an interesting regional sample of the industrial workforce during the 1910s and 1920s. Pension and retirement savings plans are for both Hercules Incorporated and Simmonds Precision Products, Inc.

Hercules Inc. was a manufacturer of chemicals and munitions based in Wilmington, Delaware. On April 23, 1986, the Commision of the European Economic Community ruled that several firms, including S.A. Hercules Chemicals N.V., the Belgian subsidiary of Hercules Incorporated, had violated Article 85(1) of the Treaty of Rome by enganging in price-fixing arrangements for the sale and marketing of polypropylene between 1977 and 1983. This collection consists of two volumes related to the company's appeal.

H.E. Schroeder (1915-2009) was a research chemist who spent most of his career with E.I. du Pont de Nemours & Company. His papers consist of documents and memorabilia covering his family and professional life.

The Hiebler family papers include documents pertaining to four generations. The bulk of the collection consists of letters written by Alfred I. du Pont to his grandsons Bayard Hiebler and Benno Hiebler, dated 1927 to 1935.

E.I. du Pont de Nemours & Company is a chemical company more commonly referred to as the DuPont Company. The DuPont Building occupied an entire block bound by 10th, 11th, Orange and Market Streets and was one of the first high-rises in Wilmington, Delaware. Until early 2015 the building housed DuPont's headquarters. This small collection of files on DuPont Company history and biographies were removed from the company's downtown headquarters building prior to its move to the suburbs.

Francis Gurney du Pont (1850-1904) was the youngest son of Alexis I. du Pont (1816-1857) and Joanna Smith du Pont (1815-1876), and grandson of Éleuthère Irénée "E.I." du Pont (1771-1834), founder of E.I. du Pont de Nemours & Company, a chemical company more commonly referred to as the DuPont Company. The collection contains a carbon typescript of "History of Explosions at Brandywine Mills" compiled from records by du Pont and also reported from his own experiences.

Harry O. Sooy (1875-1927) worked at Berliner Gramophone Company and Victor Talking Machine Company and was involved in the development of American sound recording. His papers contain a diary photocopy that is either a typed original or transcript of a diary that Sooy kept from the time of his employment with Eldridge R. Johnson (1867-1945) from 1898 to the end of 1925. Also included are four miscellaneous items: formula for grading and grinding precious stones, regulations governing the Victor Cooperative Beneficial Association, Red Cross benefit concert, and United War Work Campaign concert.

Hologic, Inc. is a developer and manufacturer of medical x-ray imaging instruments with a primary focus on mammography and women's health. The company was founded in 1985 by S. David Ellenbogen (1938-2001) and Jay A. Stein (1942-) in Bedford, Massachusetts. Researchers can expect to find print and digital materials, including medical journal articles, marketing brochures, presentations from sales and marketing meetings, digital photographs of doctors' offices with mammography equipment, price books, Radiological Society of North America annual conventions preparation materials, and pictures and slideshows from company retreats. The finding aid is arranged into four series: Hologic, Inc. company and people, Marketing files, Conferences and sales meetings files, and Articles.

Hoopes Brothers & Darlington was a firm that produced wooden wheels. It was founded by brothers Thomas Hoopes (1834-1925) and William Hoopes (1830-1917) on their farm about a mile northwest of West Chester, Pennsylvania, in 1866. Initially, they manufactured spokes for wagon wheels from local timber. In 1869, they established a factory in West Chester proper and, within three years, were manufacturing complete wooden wheels. In time the firm became the largest establishment of its kind east of the Allegheny Mountains. The records of Hoopes Brothers & Darlington, Inc. are relatively complete and give a full picture of the firm during its peak years in the late nineteenth and early twentieth centuries.

Hoopes Brothers & Darlington was a firm that produced wooden wheels. It was founded by brothers Thomas Hoopes (1834-1925) and William Hoopes (1830-1917) on their farm about a mile northwest of West Chester, Pennsylvania, in 1866. Initially, they manufactured spokes for wagon wheels from local timber. In 1869, they established a factory in West Chester proper and, within three years, were manufacturing complete wooden wheels. In time the firm became the largest establishment of its kind east of the Allegheny Mountains. This small collection consists of an account book of rim stock; a biography of one of the firm's founders, Thomas Hoopes; the autobiography of lime kiln owner John G. Robison; Edward S. Darlington's membership certificate in the Carriage Builders National Association; and board of directors' meeting minutes from 1903 to 1932.

Horace Holden Thayer, Jr. (1878-1959) was a naval architect, mechinical engineer, and businessman. Between 1909 and 1914 Thayer worked for the Delaware Construction Company which was a building company, and a subsidary of the National Real Estate Trust Company, which provided loans and financing for the properties. This small collection consists of papers relating to Thayer's early work with the National Real Estate Trust Company and the Delaware Construction Co. These materials document the formation of the National Real Estate Trust Company and building specifications for the Delaware Construction Co. There is a small amount of papers related to the businesses of his father-in-law Thomas H. Savery (1837-1910), specifically the Harpers Ferry Paper Company and the Shanandeoah Pulp Company.

Hotel du Pont is a historic hotel located in Wilmington, Delaware that opened in 1913. The Hotel du Pont Company was organized on July 2, 1912, for the purpose of operating a hotel within the Du Pont Building in downtown Wilmington. The Hotel du Pont historical files were collected to assist in the preparation of an Arcadia book by Joanna L. Arat, which was issued to mark the 100th anniversary of the hotel, and include administrative records, marketing and sales information, food services and material related to other special events.