File:The photographic history of the Civil War - thousands of scenes photographed 1861-65, with text by many special authorities (1911) (14762615992).jpg
DescriptionThe photographic history of the Civil War - thousands of scenes photographed 1861-65, with text by many special authorities (1911) (14762615992).jpg
Text Appearing Before Image:
' Text Appearing After Image: SOLDIERS BY THE UPPER PONTOON BRIDGE AT DEEP BOTTOM - JAMES RIVER, 1864. To construct a pontoon bridge the first boat launched was rowed up-stream a short distance. The anchor was let go. It's rope was then paid out sufficiently to drop the boat down into position. A second anchor was dropped a short distance down-stream, if the current proved irregular.The second boat was placed in position by the same process. Then the sills of the bridge, called balk, could be placed across by floating the second boat alongside the first, placing the ends of the balk, usually five in number, across the gunwale, and then shoving the boat into position by pushing on the inner ends of the balk. These ends had heavy cleats so that they could be engaged over the further gun-wale of each boat. The
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