179th New York Volunteer Infantry

A Union Regiment Forged in the Petersburg Campaign

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chapter 9
The Siege Begins
Bushrod Johnson Petersburg Front Gallery Cross-section Gallery Entry Mine Sketch Petersburg Lines
Mine Sketch
Mine Sketch Scaled derived from Report 190, OR (40):556-563 Lt. Col. Henry Pleasants, 48th PA Infantry The original drawing on page 559 shows a vertical scale of 20 feet to the inch where the horizontal is 100 feet to the inch. This allows a compact view which fits well on a sheet of paper. The version here compresses the vertical by a factor of 5, so the visual effect is more natural.