Historically, explanation has been associated with causation: to explain an event or phenomenon is to identify its cause. But with the growth and development of philosophy of science in the 20th century, the concept of explanation began to receive more rigorous and specific analysis.
For making jump rings, use 10- to 18-gauge wire (2.5 to 1.3 mm). Bracelet and necklace wire components are generally made out of wire that is 16-, 18- or 20-gauge (1.3 to 0.8 mm). Earring wires are usually made out of 18- or 20-gauge wire (1.0 to 0.8 mm).
Wire Diameter: Typical Usage: 0.1mm wire: Used for fly tying of dry flies as very fine and also for smaller nymphs sizes 16 and smaller: 0.2mm wire: This is a thicker wire, this is used for fly tying for general nymphs, lures, streamers and is used on the Copper John and Brassie trout flies: 0.3mm wire