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Motorboat trip around the Dead Sea. Jebel. Usdum. Salt stalactites. Drip formations in rock salt crevice.

Motorboat trip around the Dead Sea. Jebel. Usdum. Salt stalactites. Dr...

Picryl description: Public domain image of a quarry, mine, excavation, or mining site, free to use, no copyright restrictions.

Mammoth Cave, Edmondson Co., Ky.: Elbow crevice

Mammoth Cave, Edmondson Co., Ky.: Elbow crevice

Stereo copyrighted by Ben Hains, New Albany, Ind. This record contains unverified, old data from caption card. No. 32. Caption card tracings: Caves; Ky. M- C-; Shelf.

Grand Coulee Dam, Columbia Basin Reclamation Project. The east face of block 31 with a portion of the deep crevice shown in the foreground showing the high trestle, elev. 1028, high pour in center of picture at elev. 915; bottom of crevice at elev. 795; and deck of low trestle at elev. 950

Grand Coulee Dam, Columbia Basin Reclamation Project. The east face of...

Picryl description: Public domain image of a mine, mining, free to use, no copyright restrictions.

The President, Goff and Borah "sizing up" one of the dead bears after it rolled into a crevice in the rocks

The President, Goff and Borah "sizing up" one of the dead bears after ...

Photograph showing Theodore Roosevelt and party hunting a bear in the woods. H62198 U.S. Copyright Office.

Putting tire into curing mold. From the vacuum expander, the potential new truck tire is taken to this "watch-case" curing mold in which it is baked under high heat and pressure for a long time. The exact time and temperature varies with the type and size of tire. The airbag inside the carcass is filled with live steam during this process so that heat is added from both inside and out. The mold contains the tread pattern, or design, as well as all markings which will appear on sidewall. Under this heat and pressure the rubber turns semi-liquid, and flows into every crevice, completely bonding the rubber processed fabric carcass to the cushion, the cushion to the tread. After this operation it is now one unit--a complete tire. Firestone (General) Tires, Akron, Ohio

Putting tire into curing mold. From the vacuum expander, the potential...

Public domain photograph of indoor, interior activity, America in the 1930s, free to use, no copyright restrictions image - Picryl description