Photograph of oil circuit breakers at Basic Magnesium, Inc.   Creator:   Basic Magnesium, Inc. ( Contributing Institution ) Publication Date:   1942-05-11 Type:   Photograph Source Institution:   Henderson District Public Libraries Holding Location:   Henderson District Public Libraries Subject Keyword:   Electric circuit-breakers Electric power Machinery, supplies, equipment Genre:   Photographs Photograph of oil circuit breakers at Basic Magnesium, Inc.	Photograph of oil circuit breakers at Basic Magnesium, Inc.   Creator:   Basic Magnesium, Inc. Publication Date:   1942-05-11 Type:   Photograph Source Institution:   Henderson District Public Libraries Holding Location:   Henderson District Public Libraries Subject Keyword:   Electric circuit-breakers Electric power Machinery, supplies, equipment Genre:   Photographs Photograph of oil circuit breakers at Basic Magnesium, Inc.