Show penn station bulletin EFFECTS wind beep off effect act wind keep surface ground deep deep jeep mountain often find water surface hat cannot stand stand stud against almost current bottom where velocity same principle surface dry land kept un Jui motion tn wind dry land smooth wind fast along surface soil soil height PI above often sweep soil off field BB measure g principle keep surface vt ground dry land country always land wind season st wind principle tar tar far ban packer ground grain drill packer iron rim soil seed bed bring small surface ana ground retard wind seen wind across field thai packer fine dust around across low fields left smooth dust grain tn right right night angles wind colorado experiment g abe |