Show TREE PUZZLE TO FORESTERS peculiar formation of spruce has ha caused speculation among men learned in that lore A cross section of a great old spruce tree from alaska tells the story ot of a tree which executed a spin like a ballet dancer this cross section shown show a most peculiar spiral structure which has caused a great deal of speculation among the various foresters throughout the country and a very interesting explanation Is advanced in american forestry it Is known that a tree growing at a slant forms on the lower side of the trunk a dense reddish wood known as roth rotholz oiz tills this spiral in this case la Is of such sort and ns as it Is a continuous formation winding from the center to within halt half an inch from the circumference it Is surmised that it was growing in an inclined position on the edge of a glacier where by some shifting it was caused to rotate so that all sides of the tree were successively on the downward side thus as the tree grew and its rotation continued slowly the 11 rotholz developed into a spiral |