summer wheat ID: 1336 3162 2014 0065 [detail] Sherry Ballard © 2004 California Academy of Sciences	Smokey the Bear sign ID: 1336 3162 2014 0069 [detail] Sherry Ballard © 2004 California Academy of Sciences	clear-cut logging ID: 1336 3162 2014 0071 [detail] Sherry Ballard © 2004 California Academy of Sciences	clear-cut logging ID: 1336 3162 2014 0073 [detail] Sherry Ballard © 2004 California Academy of Sciences
kiln and pond ID: 1336 3162 2014 0074 [detail] Sherry Ballard © 2004 California Academy of Sciences	kiln ID: 1336 3162 2014 0075 [detail] Sherry Ballard © 2004 California Academy of Sciences	sawmill pond ID: 1336 3162 2014 0076 [detail] Sherry Ballard © 2004 California Academy of Sciences	slash burning ID: 1336 3162 2014 0077 [detail] Sherry Ballard © 2004 California Academy of Sciences
loading valves, Union Oil Company ID: 1336 3162 2014 0084 [detail] Sherry Ballard © 2004 California Academy of Sciences	tanks and pipes, Union Oil Company ID: 1336 3162 2014 0085 [detail] Sherry Ballard © 2004 California Academy of Sciences	refinery, Union Oil Company ID: 1336 3162 2014 0086 [detail] Sherry Ballard © 2004 California Academy of Sciences	tanks and blending valves, Union Oil Company ID: 1336 3162 2014 0087 [detail] Sherry Ballard © 2004 California Academy of Sciences
Hoover Dam ID: 1336 3162 2014 0083 [detail] Sherry Ballard © 2004 California Academy of Sciences	lobster traps ID: 1338 3161 0874 0104 [detail] Sherry Ballard © 2004 California Academy of Sciences	Mount Chocorua (New Hampshire) ID: 1338 3161 0874 0105 [detail] Sherry Ballard © 2004 California Academy of Sciences	New Hampshire ID: 1338 3161 0874 0106 [detail] Sherry Ballard © 2004 California Academy of Sciences
New Hampshire ID: 1338 3161 0874 0107 [detail] Sherry Ballard © 2004 California Academy of Sciences	Badlands cliffs (South Dakota) ID: 1338 3161 0874 0108 [detail] Sherry Ballard © 2004 California Academy of Sciences	Badlands cliffs (South Dakota) ID: 1338 3161 0874 0109 [detail] Sherry Ballard © 2004 California Academy of Sciences	Ozark Mountains (Arkansas) ID: 1338 3161 0874 0110 [detail] Sherry Ballard © 2004 California Academy of Sciences
Wisconsin ID: 1338 3161 0874 0111 [detail] Sherry Ballard © 2004 California Academy of Sciences	Wisconsin ID: 1338 3161 0874 0112 [detail] Sherry Ballard © 2004 California Academy of Sciences	Wisconsin ID: 1338 3161 0874 0113 [detail] Sherry Ballard © 2004 California Academy of Sciences	Castor canadensis Beaver ID: 1338 3161 0874 0114 [detail] Sherry Ballard © 2004 California Academy of Sciences

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