LECTURES Events This Week AN ARCHIVE OF EPIC PROPORTIONS. Center for Creative Photography. Speedway Boulevard and Olive Avenue. 621-7968. Archivist Amy rule discusses the task of organizing, describing and storing the W. Eugene Smith archive that arrived at the time of the photographer's death to the University. Lecture begins at 5:30 p.m. on Thursday, September 26. COLOR VISCOSITY WORKSHOP & LECTURE. PCC Center for the Arts. 2202 W. Anklam Road. In conjunction with the current exhibit featuring Bryon Draper, Karen Hymer-Thompson and Monirul Islam, master printmaker Islam presents a lecture and three-day workshop. Lecture begins at 7 p.m on Wednesday, September 26. Workshop takes place September 26 through 28. Call 206-6942 for details. THE HIGHEST OBSERVATORY ON EARTH. Steward Observatory. 933 N. Cherry Ave. 621-5049. Dr. Peter Wehinger offers a free lecture followed by night sky viewing through the Campus Station telescope on Monday, September 30 at 7:30 p.m. Out of Town ORGAN PIPE AND SONORAN DESERT NATIONAL PARKS. Western National Park Association Store. 12880 N. Vistoso Village Drive. Oro Valley. 622-6014. Bill Broyles, author of Organ Pipe Cactus National Monument, Where Edges Meet, talks about the abundant cacti and succulents that defy these harsh climates on Wednesday, October 2 at noon and at 6:30 p.m. Free but call for reservations.