APRIL AT PENN
29 Cognitive Therapy of Depression; Mary Anne Layden, Center for Cognitive Therapy; 9 a.m.-noon; Center for Cognitive Therapy, 8th fl., 3600 Market St.; $65/person (Center for Cognitive Therapy).
29 Penn Flutes; noon-1 p.m.; 2nd floor, Events Area, Penn Bookstore (Bookstore).
30 Discussion and Signing: Street Conscious Rap; James M. Spady, author; 5-6 p.m.; 2nd floor, Events Area, Penn Bookstore (Bookstore).
30 Arbor Day-Earth Day Celebration; delight in Spring with the Philadelphia Revels, a folk-song and dance troupe, tour the Arboretum's native trees, plant your own seedling to take home, and create seed masks and tree crafts; 1-3 p.m.; Morris Arboretum; $6/adults, $5/seniors, $4/students, under 6 free; info.: (215) 247-5777, ext. 121 (Morris Arboretum).
26 Monkey Puzzles and Parking Lots: Reconstructing the Dinosaur Landscape; Kirk Johnson, Denver Museum of Natural History; 4:30 p.m.; Heilmeier Hall, Towne Building (Earth & Environmental Science; Institute for Environ-mental Studies).
27 Release of Purines from the Retinal Pigment Epithelium; Claire Mitchell, physiology; 4 p.m.; Physiology Conference Room, 4th floor, Richards Building (Physiology).
28 Partition and its Legacy: Pluralism and Assimilation in India; Zoya Hasan, Jawaharlal Nehru University; 2:30-4:30 p.m.; Room 201, Jaffe Building (Center for the Advanced Study of India).
Deadlines: The deadline for the weekly update is each Monday for the following week's issue. For the Summer At Penn, it is May 16.
Almanac, Vol. 46, No. 30, April 25, 2000