[w-] Walter White is in the [3] basement of the [-(e)i] beach house by the bay where he is trying to determine his 緯 latitude. The meth he wants to cook there in the basement can only be done at certain 緯 latitudes. He gets a 韋 tanned hide and wraps it with 糸 silk and pours sand over it. By looking at how the sand bounces off the 糸 silken 韋 tanned hide, he can determine the 緯 latitude. The 緯 latitude is appropriate, so now he can prepare to make meth down in the sandy basement.