[1363]. This exercise is to show the advantage of blackened sights.
In strong sunlight, make a triangle of sighting, using a rifle having sights worn bright. Then, being careful not to move the rifle, blacken the sights and make another triangle.
Use dotted lines for the triangle with bright sights and full lines for the triangle made with blackened sights.
The position and size of the two triangles will plainly show the advantage of using blackened sights.
Fifth Sighting Exercise
[1364]. This exercise is to illustrate the importance of knowing the effects of varying degrees of light.
In strong sunlight make a triangle of sighting. Then, being careful not to move the piece, make another triangle, the target and the man sighting having first been shaded.
The relative positions of the triangles will show the importance of knowing the effects of varying degrees of light.