Lithium string array (IMAGE) Princeton University, Engineering School Caption Princeton researchers have developed a new approach for concentrating, separating, and harvesting lithium salts. Credit Photo by Bumper DeJesus Usage Restrictions For use with credt License Original 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.