Show tree trunks may yield new facts on weather BUENOS AIRES A plan to forecast the weather by an examination of the trunks of year yea ro old trees is to be carried out by the argentine agricultural society the society urges that an examination of the tree trunks in different parts of the country would enable weather authorities to determine exactly the weather c cycles Y cles over the last few hundred years and from these to predict the likely course of future weather cycles the concentric annual layers or rings of a tree trunk vary in thickness according to the rainfall in the year concerned |