The kinetics of tantalum nitridation is charaterised by two stages. In a first stage, the formation of Î²-TaN 0.05 species leads to a strong attenuation of the metallic tantalum signal. During the second stage, Î²-TaN 0.05 transforms into Î³-Ta 2 N and cubic/hexagonal TaN species.
The Grangerson Sheperson feud is symbolic of the civil war. The Shepersons would represent the north and the Grangerfords would represent the south. In the novel the Shepersons win. This is similar because this is the exact outsome of the civil war.
This makes it a symbol of order and reasonable thinking. When it is destroyed it symbolises the loss of all sensible thinking and the start of total anarchy which is what Piggy feared the most. it is his claim to fame as he found it, and this is the first time i the novel we see how knowledgeable he is.