This 1947 photograph was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH). The image depicted a stone quarry somewhere in Indiana. Visible were excavated granite blocks arranged in piles, railroad tracks that were running through the work area, derricks (fixed cranes), and an overhead pulley system made up of 'sky-guy' and 'deadmen' cables. Under conditions such as those depicted here, workers could be exposed to potential physical injuries, as well as repiratory or dermatologic irritants.
CDC/ Barbara Jenkins, NIOSH
October 24, 2012
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