Lake Shore Cryotronics, Inc. introduced the Model 648 electromagnet power supply, a robust, fault-tolerant 10 kW supply optimized for powering large 7-inch or 10-inch research electromagnets. Lake ...

This article was originally published with the title “ Powerful Electromagnet for the Use of Oculists ” in Scientific American Magazine Vol. 105 No. 26 (December 1911), p. 573 doi:10.1038 ...