Show DR LYON RETURNS FROM EASTERN TRI TRIP P Dr D. D A. A A Lyon Lon director of the University University Uni Uni- station of the United State States s bureau of ot mines returned Tuesday Y from an extensive business trip t to Yo o New York Chicago and St. St Louis While in these cities Dr Lyon visited visite d the zinc concentration plants in operation operation op there Mr Wells who has directed affairs affair s here hero during Dr Lyons Lyon's absence will wil 1 undertake a similar expedition to th the e same tame places in the interest of th the e smelter smoke problem |