Universal Magnetometer (IMAGE) Carnegie Institution for Science Caption A DTM "universal magnetometer" in use during the Second Byrd Antarctic Expedition, 1933-1935. Dr. E. H. Bramhall is shown observing in a room cut in the ice at Little America base station. Credit Carnegie Institution Usage Restrictions Users are requested to contact Shaun Hardy at shardy@ciw.edu for permission and access to other photos. 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.