Finding Aids

Guy B. Taylor (1888-1972) worked at the DuPont Company, where he specialized in the oxidation of ammonia, the method of contact catalysis, and the synthesis of acetylene. His fragmentary papers document his career as a research chemist and include an autobiographical notebook that chronicles his life from childhood to retirement, Princeton dissertation on the dissociation of mercuric oxide, technical papers, patents, and papers from employment at DuPont's Experimental Station.

Guyencourt Nurseries, Inc. was a Delaware landscape nurser set up by three young horticulturists, William E. and Mary N.R. Phelps and G. Guy Nearing, in 1929. This small group of papers traces six years of depression-era activities by a small Delaware land-scape nursery.

H. Ledyard Towle (1890-1973) was a commercial artist, portrait painter, and color consultant to various industries. This collection consists of a matted photographic portrait of H. Ledyard Towle.

H. Ray Warren (1921-2011) was a physicist, engineer, and inventor at the Radio Corporation of America (RCA) for thirty-one years, working primarily on magnetic tape recording innovations. Warren's papers and audiovisual materials form a small collection that documents developments in magnetic recording for audio and video tape, primarily related to magnetic heads and low crosstalk processing signals. This collection is arranged into eight series: Personal files; Patent files; Proposals; Reports and technical data/information; SelectaVision files; Publications and reprints; Work meeting notes and photographs; and Audio and video recordings. The documentation is fragmentary; none of the sets of papers is complete.

H. Rodney Sharp (1880-1968) was a historic preservationist and husband of Isabella du Pont Sharp (1882-1946), a descendent of the founders of E.I. du Pont de Nemours & Company. The collection contains typed transcripts of letters written by Sharp while the Sharp family, friends, and children's nurses traveled around the world.

Henry A. Weldy and members of the Shindel family purchased the small Huhn Powder mill outside Tamaqua, Pennsylvania on the banks of the Little Schuylkill River. They operated it as the H. A. Weldy Powder Company. Illustrations on the lithograph depict Tunnel Mills and Edgeworth Mills, which comprised the H. A. Weldy Powder Company.

Charles Copeland (1867-1944) was Secretary of E.I. du Pont de Nemours and Company from 1921 to 1935. He also served on the Board of Directors from 1921 to 1942. This small collection primarily consists of scenic views of the Hagley property. The collection has been organized into three series: Brandywine and Hagley areas of Copeland estate; Rolling wheels, and Pierre Gentieu prints.

This small collection of John W. Macklem (1867-1948) contains photographs of structures in the Hagley Yards after they closed in 1921, DuPont Company office staff in Equitable Building, Wilmington, Delaware, and gunpowder labels for A.F. & Co. FF gunpowder and DuPont superfine HFg gun powder.

Alfred Victor du Pont (1798-1856), son of Sophie Madeleine Dalmas (1775-1828) and Eleuthère Irénée du Pont (1771-1834), the founder of the E.I. du Pont de Nemours & Company. He joined the company in 1818, after an explosion that killed thirty-three people. The maps in this collection depict the Hagley yard based on an 1834 survey done by du Pont.

Hahn Motor Truck Company was a manufacturer of fire trucks and buses. The company built its own chassis and commercial trucks such as delivery vehicles and construction vehicles. This small collection consists of three views of an unoccupied Hahn Motor Truck Company deluxe bus: two exteriors and one interior.

Hammond Organ Company was a manufacturer of electronic organs based in Chicago, Illinois. It was founded by inventor and engineer Laurens Hammond (1895-1973). This small collection consists of promotional materials designed to engage Hammond organ owners and prospective purchasers.

The Hanford Engineer Works in Hanford, Washington, was a plutonium production facility that was first constructed during World War II. This item is a digital copy of the aerial photograph of the Hanford facility.

The Hanford Engineer Works in Hanford, Washington, was constructed between 1943 and 1945 to create the plutonium 239 and uranium 235 used in the atomic weapons needed for World War II. Sponsored by the Army Corps of Engineers, E.I. du Pont de Nemours & Company acted as the prime contractor. This collection consists of two items: a memorandum and an organizational chart from the Construction Division of the Hanford Engineer Works.

Hardware stores sell household hardware for home improvement directly to customers. This is an image of the exterior of an unidentified hardware store. Three men are posed in front.

Hardy Jefferson Bowen (1913-2003) was an engineer and scientist. He was founder and president of Industrial Models Inc., a company which built scale models as an aid in the construction of oil refineries and chemical plants. This small collection of his papers primarily consist of materials documenting his modelmaking business.

Harpers Ferry Paper Company and Shenandoah Pulp Company were established in the late nineteenth century by Thomas H. Savery (1837-1910) along the Shenandoah and Potomac Rivers. This small collection contains a production graph and chart showing financial positions on a comparative basis for the companies.

Harpers Ferry Paper Company and Shenandoah Pulp Company were established in the late nineteenth century by Thomas H. Savery (1837-1910) along the Shenandoah and Potomac Rivers. The papers contain certificates of incorporation, financial notes, reports and charts on operation costs, statistical data on wood and pulp, inventories of material on hand at the mill, and correspondence with Horace H. Thayer Jr. (1878-1959), Savery's son-in-law.

Harry F. Brown (1886-1980) was an electrical engineer and his entire career was devoted to railroad electrification. The collections consists of materials collected by Brown relating to American railroads outside of New England and primarily includes engineering reports and memoranda relating to railroad electrification and electric locomotives and cars.

Harry F. Brown (1886-1980) was an electrical engineer, and his entire career was devoted to railroad electrification. The collection consists of personal letters received by Brown, primarily from his father, Harry B. Brown, secretary of the McLagon Foundry Company in New Haven, his mother, his sister Grace, and his uncle Charles S. Brown, professor of mechanical engineering at Vanderbilt University.

Harry J. Haon II (1901-1989) and his son Harry J. Haon III (1934-2013) were chemists and lifetime employees of E.I. du Pont de Nemours & Company, and both came to specialize in sales and marketing. The Harry J. Haon family papers are a collection of correspondence, meeting notes/minutes, drawings/maps, journal articles, DuPont publications, papers expressing once classified information about DuPont products, as well as teaching materials for employees who were novice marketing managers, sales personnel and employees in leadership positions. The collection is composed of two series consisting of the papers of Harry J. Haon, II and Harry J. Haon, III. The careers in DuPont of both Haons are well documented.

Harry Lobe Straus (1896-1949) was an early computer engineer and developer of totalisator or "tote board," an electronic system that printed and issued betting tickets at racetracks, automatically computed the bets and odds, and displayed them on a large board. This collection is a small group of papers preserved by his personal secretary, Christine Behm Nunus (1906-1998). It includes financial statements, business letters, estate papers, and items relating to Straus's biography, "Win. Place. Show."

The Pennsylvania Railroad Company was the largest railroad in the United States in terms of corporate assets and traffic from the last quarter of the nineteenth century until the decline of the northeast's and midwest's dominance of manufacturing. Harry Richmond Hippler (1875-1958) was a pharmacist in Philadelphia, Pennsylvania and an avid amateur photographer. This collection contains negatives primarily of Pennsylvania Railroad (PRR) train cars, both interior and exterior views. There are also images of train tracks, bridges, construction and other railroad related images. The bulk of the photographs date from the 1910s through the 1940s. It is possible that Harry R. Hippler was the photographer of some of the photographs in the collection.

The collection consists of 46 nitrate negatives and one folio filled with 46 vertical aerial photographs of New Castle County, Delaware and the surrounding areas, including nearby southern Chester County, Pennsylvania. The flight altitude was approximately 25,000 feet and the resulting vertical photographs had a scale of approximately 1 inch to 3,100 feet.

Harvey Bounds (1893-1982) was the unofficial historian for Joseph Bancroft & Sons Company. The Joseph Bancroft & Sons Company manufactured, bleached, dyed, and finished a variety of cotton-made goods along the Brandywine River in Wilmington, Delaware. This collection is comprised of four reports Bounds collected regarding the history of the company.

Thomas William Harvey (1795-1854) was an important inventor in the arts of metalworking and metallurgy. The Harvey family papers primarily relate to Thomas William Harvey and his magnetic experiments. It also includes a biography written by his great-grandson Thomas W. Harvey (1884-1965), articles of association of the Harvey Galvanic Company, and two account books of the Harvey Electro Magnetic Company.

Thomas William Harvey (1795-1854) and his son, Hayward Augustus Harvey (1824-1893), were two important inventors in the arts of metalworking and metallurgy. The Harvey Steel Company constructed a furnace for making file and tool steel in Jersey City, New Jersey, in 1887. In 1889, the company erected a much larger plant near Brills Station in Newark, and expanded it into the treating of armor plate. Thomas W. Harvey is represented in this collection by a selection of documents covering his business career. These include deeds to family property. There are small amounts of correspondence regarding his inventions and the patent laws, including an "Essay upon Iron," affidavits regarding his screw machine, and sketches for several inventions. The papers of Hayward Augustus Harvey include copies of patents and drawings of his various inventions and documents arising from patent litigation. However, the bulk of papers concern the Harvey Steel companies and the Harvey process.

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.

Hayden & Crouch were in the chair manufacturing business for a ten-year period from 1888 to 1898 in Rochester, New York. No mention is made of Hayden & Crouch after the 1898 directory. The album contains pictures of thirty-five wooden chairs, some with casters, some rocking chairs.

The Hay’s Fruit Juice Company produced “Hay’s Five Fruit,” fruit juice syrup used to make and flavor beverages and desserts. The company was founded in 1900 in Portland, Maine. The Hay’s Fruit Juice Company album contains photographs and advertisements. The photographs are primarily of the factory’s interiors.

The Hazard Powder Company was one of the largest gunpowder and explosives manufacturers in the United States in the late-nineteenth century. This group consists of six mounted photographs showing unidentified buildings and the dam at the Hazard Powder Company in Connecticut. An unrelated print shows a covered bridge photographed in winter that crossed the Brandywine River at 16th Street in Wilmington, Delaware.

The Hazard Powder Company was one of the largest gunpowder and explosives manufacturers in the United States in the late-nineteenth century. This small collection consists of fourteen photographs of views of Hazard Powder Company buildings. None of the images are dated, however, they appear to date from circa 1890s to the 1900s.

Henry du Pont (1812-1889) was the second son of Eleuthère Irénée du Pont (1771-1834) and senior partner of E.I du Pont de Nemours & Company from 1850 to 1889. The collection consists of materials relating to the descendants of Henry and Louisa Gerhard du Pont. Primarily, the collection consists of portraits and other photographs of their daughters Evelina, Ellen, Louisa, Sara, Victorine, Sophie and other family members.

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 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. In the course of conducting her business, Cushman collected a wide variety of business publications, trade cards, ephemera, and other memorabilia with special emphasis on world expositions. She also assembled her own general picture archive for use in her business.

A match cover or a matchbook cover is a thin piece of cardboard that is folded around a set of match sticks. Chemist, John Walker (1781-1859) invented the match stick in 1827. Joshua Pusey (1842-1906?), an inventor and attorney patented matchbook covers in 1892. Within a short time hotels, restaurants, airlines, and all kinds of stores began advertising using matchbook covers. This is a small collection of matchbook covers from restaurants, hotels, and various local businesses.

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. This small collection consists of photographs which primarily show exterior views of the plant, and some interior views as well as photographs of the company's products and personnel.

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.