Cp. of bitumen in prospecting trench, Gaujacq, France. 1928GrayscaleClapp Nitrate Negatives, Box
Basalt breccia in Pont-du-Chateau, Puy-de-dome, Fr. 1928GrayscaleClapp Nitrate Negatives, Box
Old church at Landes, France. Brassempouy, Landes. 1929GrayscaleClapp Nitrate Negatives, Box
German trenches, nr. St. Mihiel, France. 1930GrayscaleClapp Nitrate Negatives, Box
Bitumen bed in sand (Tertiary) Bastennes. 1929GrayscaleClapp Nitrate Negatives, Box
Entrance to bitumen mine, Pont-du-Chateau, Puy-de-Dome, France. 1928GrayscaleClapp Nitrate Negatives...
Entrance to bitumen mine, Pont-du-Chateau, Puy-de-Dome, Fr. 1928GrayscaleClapp Nitrate Negatives, Bo...
Outcrop of tar sands on contact wi. breccias Gerzet Puy-de-Dome, France. 1928GrayscaleClapp Nitrate ...
An oil well of the Gov'n. Gabian, France. 1928GrayscaleClapp Nitrate Negatives, Box
Dolomite cp. at E9, close to oil wells, Gabian, France. 1928GrayscaleClapp Nitrate Negatives, Box
Blotches of heavy oil n w. in sump-hole Mirabelle well, nr. Riom, Puy-de-Dome, Fr. 1928GrayscaleClap...
A well of the Pechelbronn Co., pumping oil, Gabian, France. 1928GrayscaleClapp Nitrate Negatives, Bo...
Min. spr. ho. & site of oil seep, St. Boes, France. 1929GrayscaleClapp Nitrate Negatives, Box
L. S. crop close to oil wells, Gabian, France. 1928GrayscaleClapp Nitrate Negatives, Box
Old church at Bastennes Landes, France. 1929GrayscaleClapp Nitrate Negatives, Box
View from church at Brassempouy, Landes, France. 1929GrayscaleClapp Nitrate Negatives, Box
Basalt breccia in Pont-du-Chateau, Puy-de-dome, Fr. 1928GrayscaleClapp Nitrate Negatives, Box
Old church at Landes, France. Brassempouy, Landes. 1929GrayscaleClapp Nitrate Negatives, Box
German trenches, nr. St. Mihiel, France. 1930GrayscaleClapp Nitrate Negatives, Box
Bitumen bed in sand (Tertiary) Bastennes. 1929GrayscaleClapp Nitrate Negatives, Box
Entrance to bitumen mine, Pont-du-Chateau, Puy-de-Dome, France. 1928GrayscaleClapp Nitrate Negatives...
Entrance to bitumen mine, Pont-du-Chateau, Puy-de-Dome, Fr. 1928GrayscaleClapp Nitrate Negatives, Bo...
Outcrop of tar sands on contact wi. breccias Gerzet Puy-de-Dome, France. 1928GrayscaleClapp Nitrate ...
An oil well of the Gov'n. Gabian, France. 1928GrayscaleClapp Nitrate Negatives, Box
Dolomite cp. at E9, close to oil wells, Gabian, France. 1928GrayscaleClapp Nitrate Negatives, Box
Blotches of heavy oil n w. in sump-hole Mirabelle well, nr. Riom, Puy-de-Dome, Fr. 1928GrayscaleClap...
A well of the Pechelbronn Co., pumping oil, Gabian, France. 1928GrayscaleClapp Nitrate Negatives, Bo...
Min. spr. ho. & site of oil seep, St. Boes, France. 1929GrayscaleClapp Nitrate Negatives, Box
L. S. crop close to oil wells, Gabian, France. 1928GrayscaleClapp Nitrate Negatives, Box
Old church at Bastennes Landes, France. 1929GrayscaleClapp Nitrate Negatives, Box
View from church at Brassempouy, Landes, France. 1929GrayscaleClapp Nitrate Negatives, Box
Basalt breccia in Pont-du-Chateau, Puy-de-dome, Fr. 1928GrayscaleClapp Nitrate Negatives, Box
Old church at Landes, France. Brassempouy, Landes. 1929GrayscaleClapp Nitrate Negatives, Box
German trenches, nr. St. Mihiel, France. 1930GrayscaleClapp Nitrate Negatives, Box