The Magnet History First magnets were built using
{"Image DocumentName": "The Magnet History First magnets were built using", "Image ImageDescription": "ferromagnetic material= permanent magnet. Then Electromagnets: i.e. field was generated by wiring of conducting material. Now: cyomagnets: i.e. electromagnets made of superconducting wire. A cutted magnet.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}