Show There Is No Wind When the Wind Is Not Elowin Blowing Wind Is air nil naturally and horizontally horizontally horizon horizon- tally In motion with a n certain e degn-e of velocity Thus Titus the old question Where Is the wind when It Is not blowing blotting is pointless because there then Is no wind l which Is not blowing sa says saysa s 's sn a n writer In the Indianapolis News Pure air all Is composed of or colorless gases am ant is transparent Th Therefore CIC fore the wind could not he be seen If the air nil were pure pUle but the ah a always s 's contains minute particles articles of substances other than the constituent gases ases Dill anti and andone antione one can see the wind readily enough with the aid aill of a n bright sheet of or metal metar two 1 feet In length with one edge straight ht such as a n polished handsaw of large largo size A windy day when the theair theair theall air all Is dry should be selected for the experiment to get the best results The sheet of metal or saw should be lie held heM at right angles to the wind that Is if the wind Is blowing from the south the blade should point east and west with the straight edge up and tilted n a away from the direction of ol the wind at an nn angle of about 33 35 to 40 degrees permitting the air nIl current to strike the smooth surface and glance upward If one then sights carefully along the blade at some sharply defined object In the vicinity one will see the air nil flowing over oyer the edge In graceful curves like m water going un over r a u dam The speed but not the volume of the overflow o increases with the strength of oC the I wind The phenomenon Is similar to the waves of air all seen near a hot I stove e or over oyer the ground roofs and other surfaces on hot clear summer I Ida da days s. I I |