Popular science monthly . ttree trunks that are to be found in almostall woods are mystifying and wonder isoften aroused as to the cause. Foresterswill tell cjuestioners that in the case oftrees in mountainous country and othersections where the snowfall is heavy,the weight of snow is responsible in mostinstances for the queer twists they as-sume. When a tree is young the weightof snow that falls on its braiuhcs oftenbends the trunk over until it is Hat linedto the ground. Sometimes it is buried under six or eight feet of snowand held in that position so longthat when warm weather comesthe tre
Popular science monthly . ttree trunks that are to be found in almostall woods are mystifying and wonder isoften aroused as to the cause. Foresterswill tell cjuestioners that in the case oftrees in mountainous country and othersections where the snowfall is heavy,the weight of snow is responsible in mostinstances for the queer twists they as-sume. When a tree is young the weightof snow that falls on its braiuhcs oftenbends the trunk over until it is Hat linedto the ground. Sometimes it is buried under six or eight feet of snowand held in that position so longthat when warm weather comesthe tree fails to spring back intoit normal position. The summersun causes the tip of the youngtree to turn upward and if itmanages to withstand the Aveightof the snow of the next winter,that portion of the tree will, asa general rule, continue to growin a nomial way. Hair-pinbends and other odd shapesresult. The bending over of a smalltree under the weight of a heavybranch or tree-trunk that fallson it also results in producing. these .seemingly freakish formations. A curious tree stands on the top ofTunnel llill, Johnstown, Pa., about fourmiles from town. It is a sugar mapleabout one inmdred years old which hasprolonged its own life by grafting abranch into a nuich younger tree. Popular Science Monthly 513 A Slab of Sandstone Seventy-FiveMillion Years Old A SLAB of sandstone stands on edge inthe bed of an Ohio stream. It haspeculiar markings made in times past byripples when the stone was soft sand. Tlielayer of rock from which this skib was brokenextends far back into the bank of the stream,and comes to light again in a quarry a miledistant. In fact when the ripple marks wereformed it was the soft sand of an ocean short the pictured slab is a piece ofwhat geologists call Berea sandstone, formedfrom ancient sediments at least se\cnty-fivemillion years ago. To-day the Berea sand-stone beds are of importance because greatquantities of oil and gas are found in them. A Curious
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
