CORVALLIS - More than 300 leading scientists from across the western United States will attend the 78th annual meeting of the Pacific Division of the American Association for the Advancement of Science.

The conference will be June 22-26 at Oregon State University.

The meetings will include numerous scientific presentations, two public lectures, a poster session, local and extended field trips, a reception for K-12 teachers, student awards and other activities.

Topics will range from the effect of parenting on self-esteem to nitrate pollution, improved biology education, salmon conservation and climate change.

The public lectures include: Bruce Mate, an OSU professor of fisheries and wildlife, presenting "Whales: a Multimedia Lecture," on June 23 at 12:15 p.m. in the Agriculture and Life Sciences Building, Room 4000; and Mark Aldrich, a professor of economics at Smith College, presenting "The Peril of the Broken Rail: Science and Railroad Safety in the Early 20th Century" on June 23 at 7:15 p.m. in the MU Forum East.

Jane Lubchenco, past president of the AAAS and distinguished professor of zoology at OSU, will welcome participants on June 23 with a presentation titled "AAAS and the 21st Century: Where Do We Go From Here?"

Other symposia and workshops include:

- Fate of nitrogen in the environment

- Electronic information systems

- Molecular genetics of forest trees

- Climate change and Douglas-fir seedlings

- North Pacific Rim salmon conservation

- Advances in paleobiology

- Nature of visual thinking during childhood

- Politics of tobacco control

- New manufacturing technologies

- Watershed analysis

More information about registration, fees and field trips can be obtained by contacting the Pacific Division AAAS Meetings, California Academy of Sciences, Golden Gate Park, San Francisco, Calif., 94118.

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Allen Leviton, 415-752-1554