# What kind of shotgun has E L G in a circle on the barrels and the markings U M G on the outside?

The circled ELG is a proofmark indicating manufacture in Belgium. If there is a crown above this mark, it would indicate proof testing after 1893, and if not it would have been earlier. Could the UMG be UMC instead? That could stand for Union Machine Company, a trade name used by Henri Pieper, Herstal, Belgium, 1877-1898.

### When does The circle of illumination touch the Antarctic Circle?

That happens twice a year ... -- At the moment of the December solstice, the Antarctic Circle is completely inside the circle of illumination, and tangent to it on the inside. -- At the moment of the June solstice, the Antarctic Circle is completely outside the circle of illumination, and tangent to it on the outside. At any other moment during the year except for these two, the circle of illumination crosses the Antarctic Circle…

### What happens between a radius and a tangent in a circle?

A tangent is always perpendicular to the radius of a circle. A radius is a straight line going from the center of the circle to the circumference (edge) of the circle. A tangent is a straight line outside the circle that touched the circle at one (and only one) point. When a tangent touches the outside edge of the circle at the same point where a radius touches the edge of the circle, the angle…