Reservoir No. 4, near Washington, Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
From Y.M.C.A., Washington, Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box 1
Abandoned toll house, National Pike, Washington Co., Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrat...
Susquehanna R. [river], Curwensville, Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box...
Washington field, Washington Co., Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box 1
Washington Co., Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box 1
Cultivated hillside, Washington Co., Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Burning gas well, Washington Co., Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Waterfall over Benwood L., ravine tributary to Meigs Ck. [creek], Washington Co., Pa. [Pennsylvania]...
Court house & jail, Washington, Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Intake well for water, Pet. Rec. Co., Bradford field, Pa. [Pennsylvania]. (1932)GrayscaleClapp Nitra...
C. of Washington, Pa. [Pennsylvania], from south. (1904)GrayscaleClapp Nitrate Negative, Box 1
Oil wells, Washington, Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Valley of ten mile creek, near Ten-Mile, Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Terrace of Waynesburg S.S., Rich hill two, Greene Co., Pennsylvania. U.S. - disc. (1904)GrayscaleCla...
W. [water] flowing from well of Pet. Rec. Co., Bradford, Pa. [Pennsylvania]. (1932)GrayscaleClapp Ni...
From Y.M.C.A., Washington, Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box 1
Abandoned toll house, National Pike, Washington Co., Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrat...
Susquehanna R. [river], Curwensville, Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box...
Washington field, Washington Co., Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box 1
Washington Co., Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box 1
Cultivated hillside, Washington Co., Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Burning gas well, Washington Co., Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Waterfall over Benwood L., ravine tributary to Meigs Ck. [creek], Washington Co., Pa. [Pennsylvania]...
Court house & jail, Washington, Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Intake well for water, Pet. Rec. Co., Bradford field, Pa. [Pennsylvania]. (1932)GrayscaleClapp Nitra...
C. of Washington, Pa. [Pennsylvania], from south. (1904)GrayscaleClapp Nitrate Negative, Box 1
Oil wells, Washington, Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Valley of ten mile creek, near Ten-Mile, Pennsylvania. (1904)GrayscaleClapp Nitrate Negative, Box 1
Terrace of Waynesburg S.S., Rich hill two, Greene Co., Pennsylvania. U.S. - disc. (1904)GrayscaleCla...
W. [water] flowing from well of Pet. Rec. Co., Bradford, Pa. [Pennsylvania]. (1932)GrayscaleClapp Ni...
From Y.M.C.A., Washington, Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box 1
Abandoned toll house, National Pike, Washington Co., Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrat...
Susquehanna R. [river], Curwensville, Pa. [Pennsylvania]. (1904)GrayscaleClapp Nitrate Negative, Box...