b'Takingtheriskoutofroofing,gravelis moved mech,anically fromrailroadcar through This meantthe Department\'sproceed duringwinterweather,theaccident rateconveyorsystemto therooftop where mechaings were based purely on a guess, predian inflated one, in that minor cues andnismisagainusedtospreadthesurfacing. ,vas cated on the injury rates of the industry.bruiseswhich wouldbedismissed bythe McCawleyadmittedthatthesewereinjuredduringthesummer,provided highbutpointedoutthat inaseasonalevidencefor"goingoncompensation" industry,involving working intheopenduring the winter. 42JANUARY,1962'