 - Happy Hollow Park in West Lafayette 12/24/99 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Happy Hollow Park in West Lafayette 12/24/99 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Happy Hollow Park in West Lafayette 12/24/99 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Happy Hollow Park in West Lafayette 12/24/99 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Happy Hollow Park in West Lafayette 12/24/99 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Happy Hollow Park in West Lafayette 12/15/99 (Chicago, Ann Arbor MI, Lafayette IN, December 4 - 15, 1999)
 Happy Hollow Park. West Lafayette, Indiana, May 5, 1999.
 Happy Hollow Park. West Lafayette, Indiana, October 21, 1999.
 Happy Hollow Park in West Lafayette, Indiana, October 10, 1999.
 Happy Hollow Park in West Lafayette, Indiana, September 22, 1999.
 Happy Hollow Park. West Lafayette, Indiana, October 21, 1999.
 Happy Hollow Park. West Lafayette, Indiana, October 21, 1999.
 Happy Hollow Park in West Lafayette, Indiana, April 30, 1999.
 Slopes of Happy Hollow Park in West Lafayette, Indiana, October 10, 1999.
 Oaks in Happy Hollow Park. West Lafayette, Indiana, October 27, 1999.
 A trail in Happy Hollow Park. West Lafayette, Indiana, October 21, 1999.
 A trail in Happy Hollow Park. West Lafayette, Indiana, October 27, 1999.
 Bottom of Happy Hollow Park. West Lafayette, Indiana, October 27, 1999.
 A trail in Happy Hollow Park. West Lafayette, Indiana, October 21, 1999.
 Late fall in Happy Hollow Park. West Lafayette, Indiana, October 27, 1999.
 Soil erosion in Happy Hollow Park. West Lafayette, Indiana, October 27, 1999.
 Maple crowns in Happy Hollow Park. West Lafayette, Indiana, October 27, 1999.
 Fall colors in Happy Hollow Park. West Lafayette, Indiana, October 27, 1999.
 Fall colors in Happy Hollow Park. West Lafayette, Indiana, October 27, 1999.
 - Ross Hills Park near Lafayette IN 12/18/99 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Ross Hills Park near Lafayette IN 12/18/99 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Wabash River in West Lafayette 12/24/99 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Trail from Lafayette to Battle Ground 1/1/00 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Trail from Lafayette to Battle Ground 1/1/00 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Trail from Lafayette to Battle Ground 1/1/00 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Trail from Lafayette to Battle Ground 1/1/00 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Trail from Lafayette to Battle Ground 1/1/00 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - Trail from Lafayette to Battle Ground 1/1/00 (West Lafayette IN, December 18, 1999 - January 1, 2000)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 - West Lafayette Nov. 26 - Dec. (West Lafayette, November 26, 1998 - January 3, 1999)
 Marilyn Avenue in West Lafayette IN, January 3, 1999.
 Carrolton Boulevard in West Lafayette IN, January 3, 1999.
 Purdue University Mall. 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)
 - 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.
 Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 A road in Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 Greenbrier in Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 Wetherill Laboratory of Chemistry at Purdue University. West Lafayette IN, January 3, 1999.
 Parasite plants in Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 A road with dogwood in Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 Abandoned vehicle in Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 Marsh plants and dogwood in Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 Phloxes and violets in grass of Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 A marsh and a meadow near Wabash River in Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 View of State (?) Street from a top level of a parking garage. West Lafayette IN, January 3, 1999.
 Frozen ornamental cabbage at Centennial Mall. Purdue University, West Lafayette IN, January 6, 1999.
 View of Nuclear Engineering Building from the lab at the Dept. of Chemistry. Purdue University, West Lafayette IN, January 6, 1999.
 Large colonies of May apples on a semishaded woodland opening near Deer Pass in Ross Hills Park, 7 miles west from West Lafayette. Indiana, May 1, 1999.
 State Road 500, 5 miles west from West Lafayette. Indiana, May 1, 1999.
 A pasture and a corn field along County Road 500 West west from Lafayette, Indiana, September 25, 1999.
 - West to Lafayette and Ross Hills Park 7/26/98 (Lafayette, July 12 - September 1, 1998)
 - West to Lafayette and Ross Hills Park 7/26/98 (Lafayette, July 12 - September 1, 1998)
 - West to Lafayette and Ross Hills Park 7/26/98 (Lafayette, July 12 - September 1, 1998)
 Yellow flowers on a corn field near State Road 350(?), 5 miles west from West Lafayette. Indiana, May 1, 1999.
 - A park near Celery Bog in West Lafayette 10/25/98 (Lafayette - Knobstone Trail, Indiana, October 25 - 31, 1998)
 - Horticulture Park in West Lafayette 11/15/98 (Lafayette, November 4 - 15, 1998)
 - Horticulture Park in West Lafayette 11/15/98 (Lafayette, November 4 - 15, 1998)
 - Horticulture Park in West Lafayette 11/15/98 (Lafayette, November 4 - 15, 1998)
 - Horticulture Park in West Lafayette 11/15/98 (Lafayette, November 4 - 15, 1998)
 Unidentified construction in Celery Bog Park. West Lafayette, Indiana, May 9, 1999.
 Founders Park at Purdue University, West Lafayette IN, 20 June, 1999.
 Founders Park in Purdue University. West Lafayette, Indiana, September 21, 1999.
 A monarch butterfly at Mascouten Park. West Lafayette, Indiana, September 6, 1999.
 Fountain near John Purdue grave, Purdue University, West Lafayette IN, January 3, 1999.
 West Lafayette. Indiana, April 30, 1999.
 Celery Bog. West Lafayette, Indiana, May 9, 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.
 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.
 Students walking between Engineering Center and Engineering Laboratories. Purdue University, West Lafayette IN, January 6, 1999.
 A spider holding a white ball on a hollow log at Heritage Trail near Battle Ground, north from Lafayette. Indiana, September 11, 1999.
 Sheridan Road. West Lafayette, Indiana, May 2, 1999.
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