Show 90 BEACON LIGHTS FOR AIRMAIL LANES WASHINGTON Aug By 21 The Associated Press Press WilliamP 1 1 McCracken Jr aviation scene secre tary tary tany of ot the commerce department Friday lay authorized the tho purchase ot of 90 inch 24 revolving to be placed soon oon on the th seven recently rece selected elected airways to facilitate tB flying by night ht The lights light will willbe willbe be 10 miles apart an and each will have ht ve a normal visibility vii visibility of SO 50 miles Work tor for erecting towers tor for the lights and other necessary equip equip- equipment ment will t be o undertaken at once will Lo Lopal 1 power will be used where available and ald In other cases gaso gaso- gaso- gaso line gasoline generators will be provided The Sperry Gyroscope compan of Brooklyn was awarded the con con- con contract tract tor for the lIght lights which schick will cost 46 ea each h |