Ammonia industry -- Employees
Subject Source: Library of Congress Subject HeadingsScope Note: Ammonia industry--Workers
Found in 1 Collection or Record:
National Ammonia Company of Pennsylvania photographs
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.
Dates: circa 1924-1929