Equatorial radius (large axis, one half), a = 6,377,397.15 m.

Polar radius (small axis, one half), 6 = 6,356,078.96 m.

Oblateness,

A meridian-degree at the equator = 110,563.68 m.

A meridian - degree at the pole = 111,679.90 m.

A degree of the equator = 111,306.58 m.

Meridian quadrant = 10,000,855.76 m.

A geographic mile = 1-15 degree of the equator = 7,420.4385 m.

Radius of the sphere having the same surface as the earth = 6,370,289.5 m.

Radius of the sphere having the same capacity as the earth = 6,370,283.2 m.

Area of the earth = 509,950,714 qkm.

Cubic contents of the earth = 1,082,841,320,000 ckm.

Gravity at the level of the sea for the geographical latitude φ, g = 9.7810m + 0.0503m sin2 φ.

Length of the seconds pendulum at the sea-level for the geographical latitude φ,

1 = 0.99102m + 0.00510m sin2 φ.

Barbed Wire

A pound of barbed wire should measure 16 1/2 feet, and an acre of ground will require 50 2/3 lb. per line of fencing.