Elements of Military Art and Science / Or, Course Of Instruction In Strategy, Fortification, Tactics Of Battles, &C.; Embracing The Duties Of Staff, Infantry, Cavalry, Artillery, And Engineers; Adapted To The Use Of Volunteers And Militia; Third Edition; With Critical Notes On The Mexican And Crimean Wars.

by H. W. Halleck

[46.]—A lunette.

[47.]—A mitre or priest-cap.

[48.]—A bastioned fort.

[49.]—Vertical section of a field intrenchment.

[50.]—Simple sap.

[51.]—Flying sap.

[52.]—Full sap.

[53.]—Crater of a military mine.

[ 54.]—Plan of the attack of a regular bastioned work.