A tripod for surveying the battlefield: map-making from pulpit rock, Lookout Mountain
The tripod signal in the background was erected by Captains Dorr and Donn, of the United States Coast Survey, in the triangular survey of the triple battlefield for making the official maps.
In the West, the operations of the Federal engineers shed luster on their corps.
Seventeen field and subaltern officers served constantly in the Western Federal armies; and though they had no regular engineer troops under them, the volunteers who received training from these officers proved their worth.
The army under Sherman had with it nine able engineers under Captain O. M. Poe, under whose supervision a number of the photographs which are reproduced in this work were taken.
He fortified many strategic points, made surveys and issued maps, reconnoitered the positions of the enemy, and managed the pontoonbridge service.
Captain Poe was a trained engineer officer, a graduate of West Point.
He was commissioned as brigadier-general of volunteers and brevetted brigadier-general of the regular army. |