Instruments & Innovation

Electric-powered meter with instructions housed in wooden box. Movable components within box: two (2) slide glass filters (1 with red, green, and blue slides; 1 with orange, green, and blue slides); one (1) encasing to…

Two views of an unidentified employee adjusting the Stern Shredder machine at the Hercules Powder Company plant in Hopewell, Virginia. The shredder was used to process linter sheets of cellulosic fibrous materials, such…

General view of an unidentified employee inspecting control switches at the Hercules Powder Company plant in Hopewell, Virginia. Per notations accompanying the photograph, the control switches were explosion-proof, one…

General view of an unidentified employee inspecting the Hydrochloride Rotary System at the Hercules Powder Company plant in Hopewell, Virginia. The system was likely used during the production of so-called "chemical…

General view of an unidentified employee inspecting the control board for a Solvent Recovery system at the Hercules Powder Company plant in Hopewell, Virginia. Per notations accompanying the photograph, the system was…

General view of an unidentified employee examining a control panel used in the production of ethyl cellulose at the Hercules Powder Company plant in Hopewell, Virginia. Ethyl cellulose manufactured by the Hercules…

General view of an unidentified employee examining a control panel used in the production of ethyl cellulose at the Hercules Powder Company plant in Hopewell, Virginia. Ethyl cellulose manufactured by the Hercules…

Close-up view of an unidentified employee removing a sample of ethyl cellulose from a machine at the Hercules Powder Company plant in Hopewell, Virginia. Per notations accompanying the photograph, the sampling was one…

Close-up view of ethyl cellulose being transferred to a storage bin at the Hercules Powder Company's Ethyl Cellulose plant in Hopewell, Virginia. The employee visible in the photograph is unidentified. Ethyl cellulose…

General view of weigh-tanks for caustic soda and ethyl cellulose at the Hercules Powder Company's Ethyl Cellulose plant in Hopewell, Virginia. Per notations accompanying the photograph, caustic soda and ethyl cellulose…

General view of the interior of a portion of the Hercules Powder Company plant facilities in Hopewell, Virginia, with view of assorted industrial apparatus and machinery and several unidentified employees. The Hopewell…

General view of an unidentified female employee inspecting a treating tub used to purify ethyl cellulose at the Hercules Powder Company plant in Hopewell, Virginia. The Hopewell plant commonly produced ethyl cellulose,…

General view of a female employee cutting strands of .50 caliber powder extruded from a press to the proper length at the Radford Ordnance Works in Radford, Virginia. The Radford Ordnance Works was operated by the…

General view of laboratory technicians analyzing assorted materials in a Dow Chemical Company laboratory. Per notations accompanying the photograph, Bill Herrick (left) is analyzing calcium chloride, which was used for…

General view of technician Leo Ruhnau using an apparatus to determine the percentage of hydrochloric acid in Dowell acids at a Dow Chemical Company laboratory.

General view of technicians Marguerite Tenhunen (left) and Dorothy Ferris (right) using assorted apparatus in a Dow Chemical Company laboratory to determine the quantity of zinc present in experimental alloys.

General view of a section of the interior of the Cliffs Dow wood distillation plant located in Marquette, Michigan. Seeking a source of raw material for its new plastic, ethylcellulose, the Dow Chemical Company joined…

General view of a section of the interior of the Cliffs Dow wood distillation plant located in Marquette, Michigan. Seeking a source of raw material for its new plastic, ethylcellulose, the Dow Chemical Company joined…

A: Cast iron base attached to a sloping cast iron upright supporting the reader, prisms, sample cups, plungers, and a mechanism for raising and lowering the sample cups; two metal knobs control the height of the sample…

General view of an International Fertilizer Distributor (No. 49 Machine) in use at the U.S. Department of Agriculture's Plant Industry Station facility in Beltsville, Maryland. This machine was used to determine the…

Photograph of a double flask used by French biologist, microbiologist, and chemist Louis Pasteur (1822-1895) to demonstrate anaerobic fermentation, as displayed at the Pasteur Institute in Paris. Per notations…

Wooden box with no lid; black painted metal instrument panel on top; engraved writing on top left corner; two metal knobs projecting from panel on upper right side most likely for running electrical current;…