Ruth Patrick, a Pioneer in Science and Pollution Control Efforts, Is Dead at 105
Dr. Patrick, an adviser to presidents and the recipient of distinguished science awards, was one of the country’s leading experts in the study of freshwater ecosystems, or limnology. She achieved that renown after entering science in the 1930s, when few women were able to do so, and working for the academy for eight years without pay.
“She was worried about and addressing water pollution before the rest of us even thought of focusing on it,” James Gustave Speth, a former dean of the Yale School of Forestry and Environmental Studies, said in an e-mail message.
Dr. Patrick built her career around research on thousands of species of single-cell algae called diatoms, which float at the bottom of the food chain. She showed that measuring the kinds and numbers of diatoms revealed the type and extent of pollution in a body of water. Her method of measurement has been used around the world to help determine water quality...
