Period

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Worker spreading Asbestos Mixture on Boiler of Locomotive at Chicago and North Western Railroad]
GLS21A02_185

Worker spreading Asbestos Mixture on Boiler of Loc...

Firemen Helping One Another
GLS19A05_033

Firemen Helping One Another

Fireman Entering Smoky Doorway
GLS19A05_032

Fireman Entering Smoky Doorway

Firemen Battling Fire
GLS19A05_034

Firemen Battling Fire

Men Wearing Gas Masks Standing in Industrial Building, Detroit Publishing Company, 1920
GLS18A06_306

Men Wearing Gas Masks Standing in Industrial Build...

Group of Breaker Boys Surrounded by Hazardous Dust in Ewan Breaker, South Pittston, Pennsylvania, USA, Lewis Hine for National Child Labor Committee, January 1911
GLS18A08_146

Group of Breaker Boys Surrounded by Hazardous Dust...

Group of Coal Miners Waiting for Cage to go up at end of Work Day, South Pittston, Pennsylvania, USA, Lewis Hine for National Child Labor Committee, January 1911
GLS18A08_143

Group of Coal Miners Waiting for Cage to go up at ...