Photograph of a cleaning machine at Basic Magnesium, Inc.   Creator:   Basic Magnesium, Inc. ( Contributing Institution ) Publication Date:   1943-12-03 Type:   Photograph Source Institution:   Henderson District Public Libraries Holding Location:   Henderson District Public Libraries Subject Keyword:   Cleaning machinery and appliances Machinery, supplies, equipment Genre:   Photographs Photograph of a cleaning machine at Basic Magnesium, Inc.