. The photographic history of the Civil War : in ten volumes . a siege. A famous sap appears in theu])per photograph—that built by Logans busy men, winding its way to\^ ard the strong redan of the veteranThird Louisiana Regiment on the Jackson Road. First a parallel is opened—that is, a trench is constructedparallel to the besieged entrenchments. From this are constructed se\eral ajjproaches, or saps, to enable anapproach to be made under cover to a position where a second parallel may be. These are built in a zigzagilirection, so that the defender cannot enfilade the trench, except when very
. The photographic history of the Civil War : in ten volumes . a siege. A famous sap appears in theu])per photograph—that built by Logans busy men, winding its way to\^ ard the strong redan of the veteranThird Louisiana Regiment on the Jackson Road. First a parallel is opened—that is, a trench is constructedparallel to the besieged entrenchments. From this are constructed se\eral ajjproaches, or saps, to enable anapproach to be made under cover to a position where a second parallel may be. These are built in a zigzagilirection, so that the defender cannot enfilade the trench, except when very close to the opposing works,when it is frequently necessary to approach directly. Here is where the sap-roller comes into play. It isrolled at the head of the trench in such a manner as to protect the workmen from their opponents fire. Itmust therefore be thick enough to stop bullets. To construct a sap-roller in the form shown, two cylindricalbaskets of the same length are made, a small one to form the ulterior wall, and a larger one for the outer A SAP-ROLLER READY FOR SERVICE
Size: 1743px × 1433px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidphotographichist05inmill
