Experimental Magnetic Coil System (2 of 2) (image) Cell Press Share Print E-Mail Caption This photograph shows where reed warblers were kept in a magnetic coil system to experimentally manipulate the magnetic field. Credit Nikita Chernetsov Usage Restrictions Credit Required. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.