The Bulletin is published weekly during the academic year, except during University breaks and exam weeks, by the Princeton University Communications Office.
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All members of the faculty, staff and student body receive the Bulletin without charge. Anyone may subscribe to the Bulletin. All news, photographs and calendar announcements for the Bulletin that covers the three-week period January 11 through 31 must be received in the Communications office no later than Thursday, December 31. Winds scouring the continents carry dust laden with minute quantities of metals to the most remote reaches of Earth. In ocean waters far from land, that trace sprinkling of iron and other metals is one key to determining the productivity of marine ecosystems.