Tangent-soale
A Dictionary of Military Terms · 1918 · p. 22
A contrivance affixed to the breech of guns and now it sers, by means of which the requisite elevation may be given and the … object seen at the same time. Tangent Sight — A sight having the same steel bar as the barrel-headed sight. It is graduated in the same way,. and inclined to the same angle, but instead of the barrel-head it has a simple cro -head with sliding-leaf and clamping-screw, which is used to move the leaf to right or left.
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