From the Princeton Weekly Bulletin, November 17, 1997
Freshman seminar. Geosciences Professor Kenneth Deffeyes (above, c) demonstrates titratration of water from California's Mono Lake to members of a freshman seminar on Active Geological Processes. The students, accompanied by professors Lincoln Hollister (standing, l), Robert Phinney and Jason Morgan, spent their fall break doing field work in the Sierra Nevada, observing the results of recent volcanoes, earthquakes and glaciers. Brenda Lin (r) hefts a boulder of pumice.
1117-freshsem.html