The Ruby Gravel Company's Tunnel. Tip First Electric Railway in Great Britain. New Columbia. KAMM'S JOINTED PITCH-BOARD FOR SQUARES., scientific american, 1881-10-22

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The Ruby Gravel Company's Tunnel. Tip First Electric Railway in Great Britain. New Columbia. KAMM'S JOINTED PITCH-BOARD FOR SQUARES., scientific american, 1881-10-22

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