View of two workers drawing off molten iron from a blast furnace to make pig iron, an intermediate product of smelting iron ore, at an unknown manufacturing plant. This photograph is one of a set of fourteen…

View of a worker transferring a finished ware to the tempering over at a Glass Works factory in New Jersey. This photograph is one of a set of five stereographs detailing the production of blown-glass bottles.

Detail view of blast furnaces and feed buckets at an unknown manufacturing plant, with a worker visible on the bottom left-hand side of the photograph. Used to chemically reduce and physically convert iron oxides into…

View of two workers rolling and shaping a bottle neck at a Glass Works factory in New Jersey. This photograph is one of a set of five stereographs detailing the production of blown-glass bottles.

View of a worker preparing to finish a bottle neck at a Glass Works factory in New Jersey. This photograph is one of a set of five stereographs detailing the production of blown-glass bottles.

View of a worker blowing and turning a bottle in a mold at a Glass Works factory in New Jersey. This photograph is one of a set of five stereographs detailing the production of blown-glass bottles.

View of several workers using compressed air to blow glass into the shape of a mold at a Glass Works factory in New Jersey. This photograph is one of a set of five stereographs detailing the production of blown-glass…

View of a worker blowing pipettes for laboratory use at an unidentified factory. This photograph is one of a set of three stereographs detailing the production of glass tubing and pipettes.

View of a worker removing a flattened sheet of glass from a lehr, a temperature-controlled kiln used to slowly cool hot glass, at an unidentified factory. This photograph is one of a set of seven stereographs detailing…

View of two workers shaping special kinds of glass tubing at an unidentified factory. This photograph is one of a set of three stereographs detailing the production of glass tubing and pipettes.

View of two workers drawing out glass tubing to make chemical apparatus at an unidentified factory. This photograph is one of a set of three stereographs detailing the production of glass tubing and pipettes.

View of a worker transferring a cylinder of glass into a flattening oven at an unidentified factory. This photograph is one of a set of seven stereographs detailing the production of glass sheets.

View of a worker splitting cylinders of glass ready to be flattened into glass sheets at an unidentified factory. This photograph is one of a set of seven stereographs detailing the production of glass sheets.

View of a worker using an electric capping stick to cap off and cut a cylinder of glass into a flattening length at an unidentified factory. This photograph is one of a set of seven stereographs detailing the production…

View of two workers taking down a cylinder of glass and placing it on a capping-off horse, an apparatus used to transfer cylindrical glass sections, at an unidentified factory. This photograph is one of a set of seven…

View of a worker checking off a cylinder of glass at an unidentified factory. This photograph is one of a set of seven stereographs detailing the production of glass sheets.

View of a worker adding molten glass to the neck of a carboy, a type of vessel used for the transportation and fermentation of liquids, at a Glass Works factory in New Jersey. This photograph is one of a set of six…

View of two workers finishing the neck or "corkage" of a 12-gallon glass carboy, a type of vessel used for the transportation and fermentation of liquids, at a Glass Works factory in New Jersey. This photograph is one…

View of a row of drawing kilns used to process molten glass into continuous sheets of flat glass at an unidentified factory. This photograph is one of a set of seven stereographs detailing the production of glass sheets.

View of two workers separating a carboy, a type of vessel used for the transportation and fermentation of liquids, from the blow-pipe at a Glass Works factory in New Jersey. This photograph is one of a set of six…

View of a worker using a clay mold to blow and shape a carboy, a type of vessel used for the transportation and fermentation of liquids, at a Glass Works factory in New Jersey. This photograph is one of a set of six…

View of a worker making and fitting a ground-glass stopper to a large carboy, a type of vessel used for the transportation and fermentation of liquids, at a Glass Works factory in New Jersey. This photograph is one of a…

View of several workers blowing and shaping carboys, a type of vessel used for the transportation and fermentation of liquids, at a Glass Works factory in New Jersey. This photograph is one of a set of six stereographs…