 View of Purdue University Mall from the second floor of Electrical Engineering Building. West Lafayette, Indiana, September 21, 1999.
 S.-w. side of Purdue Mall, view from Electrical Engineering Building. Purdue University, West Lafayette, Indiana, October 29, 1999.
 Purdue Mall, the fountain, and Hall of Administration, view from Electrical Engineering Building. Purdue University, West Lafayette, Indiana, October 29, 1999.
 A grey squirrel gnawing a nut on its home range near Mechanical Engineering Building. Purdue University, West Lafayette, Indiana, October 1, 1999.
 Fountain of Purdue University Mall. West Lafayette, Indiana, September 21, 1999.
 Purdue University Mall during afternoon hours. West Lafayette, Indiana, September 21, 1999.
 Purdue University Mall. West Lafayette, Indiana, October 10, 1999.
 View of Nuclear Engineering Building from the lab at the Dept. of Chemistry. Purdue University, West Lafayette IN, January 6, 1999.
 Students walking between Engineering Center and Engineering Laboratories. Purdue University, West Lafayette IN, January 6, 1999.
 Purdue Mall and Administration Hall at Purdue University, West Lafayette IN, 20 June, 1999.
 Fountain of Purdue Mall and Bell Tower at Purdue University, West Lafayette IN, 20 June, 1999.
 Founders Park in Purdue University. West Lafayette, Indiana, September 21, 1999.
 Purdue University Mall. West Lafayette IN, January 3, 1999.
 Fountain of Purdue University Mall. West Lafayette, Indiana, March 10, 1998.
 Purdue University Mall and Bell Tower. West Lafayette, Indiana, February 27, 1998.
 Purdue University Hall and Recitation Building. West Lafayette, Indiana, March 10, 1998.
 Frozen ornamental cabbage at Centennial Mall. Purdue University, West Lafayette IN, January 6, 1999.
 Remains of a fan (?) and books after a fire in the theoretical chemistry lab of Purdue University at Memorial Day. West Lafayette, Indiana, June 1, 1999.
 Burned part of the theoretical chemistry lab (there was a bookshelf) after a fire at Memorial Day. Purdue University, West Lafayette, Indiana, June 1, 1999.
 A burned desk in the theoretical chemistry lab (there was a coffee pot?) after a fire at Memorial Day. Purdue University, West Lafayette, Indiana, June 1, 1999.
 A lecture of Sabre Kais Phase transitions and critical phenomena for electronic structure of atoms and molecules (?) at internal meeting of the quantum chemistry group of Purdue University. West Lafayette, Indiana, September 21, 1999.
 Pablo Nigra, Qicun Shi, Stephen Belair, Imad Ladadwa and Ricardo A. Sauerwein ready to listen a lecture of S. Kais at internal meeting of the quantum chemistry group of Purdue University. West Lafayette, Indiana, September 21, 1999.
 Fountain near John Purdue grave, Purdue University, West Lafayette IN, January 3, 1999.
 - Purdue University 1/3/99 (West Lafayette, November 26, 1998 - January 3, 1999)
 - Purdue University 1/3/99 (West Lafayette, November 26, 1998 - January 3, 1999)
 Purdue University, Administration Hall. West Lafayette IN, January 3, 1999.
 - Purdue University 1/3/99 (West Lafayette, November 26, 1998 - January 3, 1999)
 - Purdue University 1/3/99 (West Lafayette, November 26, 1998 - January 3, 1999)
 - Purdue University 1/3/99 (West Lafayette, November 26, 1998 - January 3, 1999)
 Founders Park at Purdue University, West Lafayette IN, 20 June, 1999.
 Qicun Shi explains to Sabre Kais correlation effects in scattering of an electron on lithium-like atom with a variable nuclear charge slightly above two after a lecture of Imad Ladadwa about ionization cross sections at internal meeting of the quantum chemistry group. Purdue University, West Lafayette, Indiana, October 1, 1999.
 Purdue University Memorial Union from State Street. West Lafayette, Indiana, March 10, 1998.
 Wetherill Laboratory of Chemistry at Purdue University. West Lafayette IN, January 3, 1999.
 Wetherill Laboratory of Chemistry at Purdue University, West Lafayette IN, 20 June, 1999.
 Brown Laboratories of Chemistry at Purdue University, West Lafayette IN, 21 June, 1999.
 Canoe trip on Tippecanoe River with international students of Purdue University. Indiana, September 18, 1999.
 Sabre Kais and Qicun Shi discuss electronic shell structure and correlations in scattering of an electron on lithium-like atom with a variable nuclear charge slightly above two after a lecture of Imad Ladadwa about ionization cross sections at internal meeting of the quantum chemistry group. Purdue University, West Lafayette, Indiana, October 1, 1999.
 Quantum chemistry group of Purdue University (Qicun Shi, Pablo Nigra, Jack Yang, Stephen Belair, Sabre Kais, Aaron Stanton) in front of "King Buffet" restaurant after $8 seafood dinner. Lafayette, Indiana, April 30, 1999.
 Pablo Serra and Huan Pablo Neirotti at a dinner in a restaurant near Purdue University. West Lafayette, Indiana, February 26, 1998.
 Jack Yang, Stephen Belair and Pablo Nigra in the lab of the Department of Chemistry (a little white fan later 5/31/99 caused a fire). Purdue University, West Lafayette IN, January 6, 1999.
 Happy Hollow Park in West Lafayette, Indiana, September 22, 1999.
 A farm near Division Road west from Lafayette, Indiana, September 25, 1999.
 Soybean field near Road 26 west to Lafayette, Indiana, September 25, 1999.
 A forest near Division Road west from Lafayette, Indiana, September 25, 1999.
 - Final banquet at Midwest Theoretical Chemistry Conference in Purdue University 5/23/98 (Indiana and Lafayette, May 15 - 24, 1998)
 - Final banquet at Midwest Theoretical Chemistry Conference in Purdue University 5/23/98 (Indiana and Lafayette, May 15 - 24, 1998)
 - Final banquet at Midwest Theoretical Chemistry Conference in Purdue University 5/23/98 (Indiana and Lafayette, May 15 - 24, 1998)
 - Final banquet at Midwest Theoretical Chemistry Conference in Purdue University 5/23/98 (Indiana and Lafayette, May 15 - 24, 1998)
 - Final banquet at Midwest Theoretical Chemistry Conference in Purdue University 5/23/98 (Indiana and Lafayette, May 15 - 24, 1998)
 A pasture and a corn field along County Road 500 West west from Lafayette, Indiana, September 25, 1999.
 A monarch butterfly at Mascouten Park. West Lafayette, Indiana, September 6, 1999.
 A trail in Ross Hills Park, 6 miles west from Lafayette, Indiana, September 25, 1999.
 A marsh in Ross Hills Park, 6 miles west from Lafayette, Indiana, September 25, 1999.
 Purdue Memorial Union (student services). West Lafayette, Indiana, February 27, 1998.
 Greenbrier and poison ivy on trees in Ross Hills Park, 6 miles west from Lafayette, Indiana, September 25, 1999.
 Forest along Wabash River in Ross Hills Park, 6 miles west from Lafayette, Indiana, September 25, 1999.
 Potholes Park, Fall Creek Gorge. The trip was organized by Purdue University International Center. Near Pine Village, Indiana, June 5, 1999.
 A water snake and big shells in Wabash River in Ross Hills Park, 6 miles west from Lafayette, Indiana, September 25, 1999.
 West Lafayette. Indiana, April 30, 1999.
 Celery Bog. West Lafayette, Indiana, May 9, 1999.
 State Street near Chauncey Hill Mall. West Lafayette, Indiana, March 10, 1998.
 A mysterious sign on a marble grave of L. Godfrey (died May 22, 1847) on a small cemetery at Kerber Road, 6 miles west from Lafayette, Indiana, September 25, 1999.
 Sheridan Road. West Lafayette, Indiana, May 2, 1999.
 Near Hillcrest(?) Road. West Lafayette, Indiana, May 2, 1999.
 Near Hillcrest(?) Road. West Lafayette, Indiana, May 2, 1999.
 Hillcrest Road. West Lafayette, Indiana, May 3, 1999.
 Maywood Drive. West Lafayette, Indiana, May 2, 1999.
 Leslie Ct. West Lafayette, Indiana, November 3, 1999.
 Carrolton Boulevard. West Lafayette, Indiana, May 2, 1999.
 Ravinia(?) Road. West Lafayette, Indiana, May 2, 1999.
 Garden Street. West Lafayette, Indiana, May 2, 1999.
 Hillcrest Road. West Lafayette, Indiana, May 3, 1999.
 Inspecting a creek in Potholes Park (Fall Creek Gorge) by international students of Purdue University. Near Pine Village, Indiana, June 5, 1999.
 Overcoming a tub in a creek in Potholes Park (Fall Creek Gorge) by an international student of Purdue University. Near Pine Village, Indiana, June 5, 1999.
 Golden Dome (administration building) at the University of Notre Dame. South Bend, Indiana, May 21, 1999.
 Blue racer snake (Coluber constrictor foxi) swimming in Wabash River in Ross Hills Park, 6 miles west from Lafayette, Indiana, September 25, 1999.
 Summit Drive. West Lafayette, Indiana, October 30, 1999.
 Northridge (?) Drive. West Lafayette, Indiana, October 30, 1999.
 Jefferson Street. West Lafayette, Indiana, November 3, 1999.
 Foresthill Drive. West Lafayette, Indiana, November 3, 1999.
 Foresthill Drive. West Lafayette, Indiana, November 8, 1999.
 Garden Street. West Lafayette, Indiana, November 3, 1999.
 Ravinia (?) Road. West Lafayette, Indiana, November 3, 1999.
 Ravinia Road. West Lafayette, Indiana, November 3, 1999.
 Garden Street. West Lafayette, Indiana, November 3, 1999.
 Hills and Dales area. West Lafayette, Indiana, May 2, 1999.
 Northridge Drive. West Lafayette, Indiana, October 30, 1999.
 Northridge Drive. West Lafayette, Indiana, October 30, 1999.
 Ravinia Road. West Lafayette, Indiana, October 30, 1999.
 Elmwood (?) Drive. West Lafayette, Indiana, October 30, 1999.
 Happy Hollow Park. West Lafayette, Indiana, May 5, 1999.
 Garden (?) Street. West Lafayette, Indiana, October 30, 1999.
 Sheridan Drive. West Lafayette, Indiana, October 30, 1999.
 Hills and Dales area. West Lafayette, Indiana, May 2, 1999.
 Hills and Dales area. West Lafayette, Indiana, May 2, 1999.
 Hills and Dales area. West Lafayette, Indiana, May 2, 1999.
 Jefferson Street. West Lafayette, Indiana, October 30, 1999.
 Ridgewood (?) Road. West Lafayette, Indiana, October 30, 1999.
 Ravinia (?) Road. West Lafayette, Indiana, October 30, 1999.
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