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Working on the boiler of a locomotive at the 40th Street shops of the C & NW RR, Chicago, Ill.
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Apparatus used at the laboratory at the C & NW RR's 40th Street yards for analysing solutions of metals used in locomotives and the railroad plant, in general, Chicago, Ill.
Working on the boiler of a locomotive at the 40th Street shops of the C & NW RR, Chicago, Ill.
Working on the boiler of a locomotive at the 40th Street shops of the C & NW RR, Chicago, Ill.