Show Black Slack Operating g gRooms Rooms Advocated Advocat ed CHICAGO May 15 black All P black All hospital operating rooms designed to reduce educe glare and aid visual precision in n surgical operations were advocated advocated last night by Dr A. A R. R Bacon of oC Chicago ago Speaking before a branch of or the Chicago Chicag Medical society Dr Bacon who ho recently returned from Russia said aid lie he had seen an operating room of f that type there The walls wails floors ceiling and all equipment lending Itself to coloring were ere dead black he said Garments or of f the surgeon and his assistants were ere of oC the same color he added |