6870SWIVEL HoorcC. E. Richards N.Attleboro' Mass. 6871 —CHuRNJ. L. Rust Keithburg Ill. 6874KNAP5ACKC.W. Schaefer Philadelphia Pa. 6876EXCAVATORG. F. Sheffield Boston Mass. 6878FASTENERH.SmileyW.T.LougheadBostonMass., scientific american, 1871-07-29

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6870SWIVEL HoorcC. E. Richards N.Attleboro' Mass. 6871 —CHuRNJ. L. Rust Keithburg Ill. 6874KNAP5ACKC.W. Schaefer Philadelphia Pa. 6876EXCAVATORG. F. Sheffield Boston Mass. 6878FASTENERH.SmileyW.T.LougheadBostonMass., scientific american, 1871-07-29
Penta Springs LLP / Alamy Stock Photo
Image ID: 2ABW7RM
6870SWIVEL HoorcC. E. Richards N.Attleboro' Mass. 6871 —CHuRNJ. L. Rust Keithburg Ill. 6874KNAP5ACKC.W. Schaefer Philadelphia Pa. 6876EXCAVATORG. F. Sheffield Boston Mass. 6878FASTENERH.SmileyW.T.LougheadBostonMass., scientific american, 1871-07-29