Black and white photographic print showing model of cyclotron built by Ernest Orlando Lawrence and C.J. Cooksey
Black and white photographic print showing model of cyclotron vacuum chamber almost in place between the poles of the electro-magnet
Black and white photographic print showing model of cyclotron between the poles of the electro-magnet ready for operation
Black and white photographic print showing model of cyclotron iron cover ready to be placed on the cyclotron vacuum chamber