Magnetic Signals (IMAGE) Saarland University Caption With the magnetometer installed inside a cylinder, even the magnetic field strength of leaves can be measured: Uwe Hartmann demonstrates this capability using a dried lotus leaf. Credit Oliver Dietze Usage Restrictions None License Licensed content 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.