7 ton hydraulic lifting jack, U.S. Capitol Ex. and Washington Aqueduct, Dudgeon's patent LCCN2002717753 Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-7-ton-hydraulic-lifting-jack-us-capitol-ex-and-washington-aqueduct-176813955.html
RMM7JG03–7 ton hydraulic lifting jack, U.S. Capitol Ex. and Washington Aqueduct, Dudgeon's patent LCCN2002717753
Eight-year old Jack carrying cans of milk on stone boat. This involves some heavy lifting. See Hine Report, Rural Child Labor, August 1915. LOC nclc.00293 Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-eight-year-old-jack-carrying-cans-of-milk-on-stone-boat-this-involves-176678511.html
RMM7CB6R–Eight-year old Jack carrying cans of milk on stone boat. This involves some heavy lifting. See Hine Report, Rural Child Labor, August 1915. LOC nclc.00293
Eight-year old Jack carrying cans of milk on stone boat. This involves some heavy lifting. See Hine Report, Rural Child Labor, August, 1915. LOC nclc.00292 Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-eight-year-old-jack-carrying-cans-of-milk-on-stone-boat-this-involves-176678510.html
RMM7CB6P–Eight-year old Jack carrying cans of milk on stone boat. This involves some heavy lifting. See Hine Report, Rural Child Labor, August, 1915. LOC nclc.00292
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