Show Whistling Strikers N. N Y t V a Exchange Pickets Try A New Tactic attic T NEW YORK April 12 ill IA strIking union of ot the New York stock and curb exchanges exchanges exchanges ex ex- changes used a new tactic tactic mass mass whistle blowing blowing In in their picketIng picketing picketing picket picket- ing Monday but were stopped topped by police Shortly before beCore the exchanges opened for trading the pickets began blowing police type whistles in unison After each whistle blast the they would yell Who Vho blows the whistle whistle 7 The question was taken from leaflets distributed in the financial district The leaflets said Police Commissioner Arthur was shifting policemen from school traffic duty to strike detail detail detail de de- de- de tail ou outside the exchanges The strike entered Its third week Monday morning with about persons persona picketing the stock and curb exchanges and four brokerage houses The striking members of ot the United Financial A F L arc are demanding a pay in increase increase In- In crease and union shop contracts The federal conciliation service has arranged a conference Monday Monday Monday Mon Mon- day between union spokesmen and officials of the curb exchange |