Photograph of an air cooling system equipment at Basic Magnesium, Inc.   Creator:   Basic Magnesium, Inc. ( Contributing Institution ) Publication Date:   1944-07-31 Type:   Photograph Source Institution:   Henderson District Public Libraries Holding Location:   Henderson District Public Libraries Subject Keyword:   Electronic apparatus and appliances -- Cooling Valves Thermostat Machinery, supplies, equipment Genre:   Photographs Photograph of an air cooling system equipment at Basic Magnesium, Inc.