These are photographs having a geographic relationship to Bethlehem, Pennsylvania, the company's headquarters, includes industrial views, office buildings, and city and community views. This consists of photographs of Bethlehem Iron Company, a predecessor company which merged with Bethlehem Steel Company in 1901, the South Bethlehem steel plant, and the forge specialty department there. There are views of the company’s offices which were photographed frequently, especially during periods of renovation. There are aerials of the city dated from 1958 to 1959. A noteworthy inclusion is "Bethlehem Plant Inspection, June 1927," a booklet commemorating Lindbergh's Spirit of St. Louis flight; the aircraft's forgings were made by Bethlehem.

Lou Sterner (dates unknown) was a Bethlehem Steel Corporation employee – presumably a company photographer. Hagley does not own his original glass plates, but there are copies of contact prints of various subjects. The majority of the work is company related; there are also some unidentified nature photographs and views of Lehigh University. One set of prints (which was mounted on cards by the company) has identification on the back.

Charles Findeisen (1919-2007) was an aerial photographer hobbyist turned professional and spent most of his life flying airplanes. Findeisen consulted for real estate development concerns, engineering firms, and construction companies among others. Virtually all of his work was in the tri-state region of New Jersey, Pennsylvania, and Delaware.

This collection contains his aerial photography from 1962 to 2000. It is comprised mostly of negatives but does include some photographs. Many of his subjects were photographed over time at regular intervals. This is particularly true of real estate development programs and building projects. But there is also one-off material of current events, local places, and landmarks.

E.I. du Pont de Nemours & Company is a chemical company more commonly referred to as the DuPont company. The DuPont Company opened the Chestnut Run Textile Research Laboratory in 1954 near Wilmington, Delaware as a research facility to test the effects of normal wear and tear on DuPont's line of synthetic fibers and fabrics. This item is a vertical aerial photograph of DuPont's Chestnut Run facility in Wilmington, Delaware.

The Dallin Aerial Surveys Company produced aerial photographs for newspapers, businesses, municipalities, and private individuals. The company was founded in 1924 by Colonel J. (John) Victor Dallin (1897-1991), a Royal Flying Corps-trained pilot who served in World War One. During WWI he became involved in aerial photography on a reconnaissance mission during the latter stages of the war. This collection consists of over 13,000 aerial photographs primarily of the Mid-Atlantic region taken between 1925 and 1941. The company made vertical and oblique aerial photographs of factories, private estates, schools, country clubs, towns, airports, rivers, and many other sites and some news events of the day. The subject with the largest number of views is the city of Philadelphia.

Aerial view showing crowded fairgrounds. The Delaware State Fair began as the Kent and Sussex County Fair in 1920, and is now known as the Delaware State Fair. 1928 was the last year the Delaware state fair was held at the Elsmere site.

E.I. du Pont de Nemours & Company is a chemical company more commonly referred to as the DuPont Company, established in 1802. In 1902 the DuPont Company acquired the Smith Electric Fuze Company and some other properties in the Pompton Lakes, New Jersey area. This collection consists of one color photograph showing three DuPont Company explosives delivery trucks, 1966 and two aerial photographs of the DuPont Company's Pompton Lakes, New Jersey, plant.

E.I. du Pont de Nemours & Company was established in 1802 by Pierre Samuel du Pont de Nemours (1739-1817) and his son Éleuthère Irénée du Pont (1771-1834). In 1903 the DuPont Company's Executive Committee established the Experimental Station, a research facility located on the banks of the Brandywine Creek across from DuPont's first black powder works. This collection contains photographs of general views of the Experimental Station showing its growth over time.

The DuPont Experimental Station is a large industrial research facility founded in 1903; focused on chemistry research. An aerial view of the DuPont Company's Experimental Station taken in 1987.

E.I. du Pont de Nemours & Company is a chemical company that began manufacturing gunpowder in 1802, and is commonly known as the DuPont Company. In 1941, the Martinsville Plant opened in Martinsville, Virginia, as DuPont's second nylon hosiery manufacturing plant. This small collection consists primarily of aerial and exterior photographs of the Martinsville Plant from the factory's construction in 1940 to 1996, two years before its closing.

Between 1802 and 1921, Eleutherian Mills was a gunpowder mill site used for the manufacture of explosives by the du Pont family business, which was founded by Éleuthère Irénée "E.I." du Pont (1771–1834). Longwood Gardens is a series of formal display gardens in Kennett Square, Pennsylvania, that was developed by Pierre S. du Pont (1870-1954), a descendent of E.I. du Pont. These are aerial views of the residence at Eleutherian Mills and Longwood Gardens taken by Dallin Aerial Surveys Company.

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 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.

Herny S. Rothrock (1906-1986) was a DuPont research chemist. In 1930, he joined the staff of the Experimental Station of E.I. du Pont de Nemours & Company. He obtained fifty-six patents, chiefly in the field of polymer chemistry and served ten years at liaison manager in the Central Research Department, retiring in 1971. This collection consists primarily of photos relating to DuPont's Experimental Station in Wilmington, Delaware. There are group photos of new employees in the Central Research Department, committees and conferences and press release photos from the 1964 New York World's Fair.

Joseph Bancroft (1803-1874), an Englishman trained in textile weaving in Lancashire, established his own cotton mill on the Brandywine near Wilmington in 1831. The operation became the Joseph Bancroft & Sons Company in 1889. The photographs consist of images related to the Joseph Bancroft & Sons textile mills in the Rockford and, later, Kentmere areas on the banks of the Brandywine River. These images include plant exteriors and interiors, officials and employees, aerials, workers' housing, machinery, floods, and dams and races on Brandywine Creek.

Louis T. Klauder and Associates (LTK) is a professional rail transportation engineering consulting firm. LTK were hired to work as consulting engineers for a joint project of the United States Department of Transportation and Pennsylvania Railroad called the Northeast Corridor Demonstration Project. This collection contains aerial photographs of the Northeast Corridor railroad route from New York to Boston taken between 1951 and 1965. These images were used to aid in the project. These aerial photographs make up a bulk of the collection. There are several sets of images that show train station exteriors along several routes on the Northeast Corridor. Thirty-eight photographs show the projects test track at Pueblo Army Depot in Colorado. There are four press photographs for Inflight Motion Pictures Inc. and a few renderings of proposed trains.

This collection consists of photographs and maps depicting the property of the Brandywine Works of E.I. du Pont de Nemours & Company. The maps and blueprints show how the property of the Brandywine Works was divided among du Pont family members for estates after the works closed. A small series of large-format photographs depict various scenes and events from the Brandywine Works and the city of Wilmington in general.

Northern Delaware (current day New Castle County) was settled by Swedes in the seventeenth century. This collections contains ten aerial photographs of the Northeastern Delaware border with Pennsylvania, along the Delaware River.

This print is an aerial photograph showing the full expanse of the Rudolph Wurlitzer Manufacturing Company factory in North Tonawanda, New York. The company initially imported musical instruments from Europe, but moved into manufacturing instruments by 1880. Shortly after the turn of the century, Wurlitzer moved to North Tonawanda, New York. By 1934 it had produced the first jukebox. In 1973, Wurlitzer sold its jukebox brand to a German company and closed the North Tonawanda factory.

The Tonopah Mining Company of Nevada was incorporated on July 12, 1901 in Delaware for the purpose of developing and operating a gold and silver ores property at Tonopah, Nevada. One aerial photograph showing small mineral mining operation at Gowanda on Miller Lake, Ontario, Canada.

These aerial photographs of the Tyler McConnell Bridge and ground views of the nearby area of Henry Clay Village, Delaware, including the Hagley Museum and Library's entrance, were commissioned by the State of Delaware Department of Transportation. The Tyler McConnell Bridge over the Brandywine River on Route 141 (Centre Road) opened in 1952. The area was documented when research began on building another bridge to replace the current two-lane bridge. There are also views of the Charles I. du Pont house.

This item is an aerial photograph of an unidentified facility.

The Wilmington Trapshooting Association (WTA) was organized in 1910 and continues to be active today. This collection consists of photographs of members of the Wilmington Trapshooting Association at various events from the early 1900s through the 1980s.