Workers operate a drill tilted at a 45 degree angle to cut across

Workers operate a drill tilted at a 45 degree angle to cut across rock strata in the bed of Crawford Pond in Piscataquis County Maine The BOSTON GLOBE FILE 1960 By

Workers operate a drill tilted at a 45 degree angle to cut across rock strata in the bed of Crawford Pond in Piscataquis County Maine The BOSTON GLOBE FILE 1960 By

Workers operate a drill tilted at a 45 degree angle to cut across rock strata in the bed of Crawford Pond in Piscataquis County Maine The BOSTON GLOBE FILE 1960 By