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.

National Ammonia Company of Pennsylvania was a manufacturer of refrigerators which utilized the Claude process of sytheic ammonia for the coolant. The company was founded by Dr. Herman F. Dannenbaum (1857-1932) in Philadelphia in 1902. The collection consists of interior and exterior photographs of the National Ammonia Company of Pennsylvania's factory in Philadelphia.