BY ARCHIBALD A. SCHENCK MEM Cram-vrA- 30VG' EMBANKMENTS' OF THE 4 Firl Frl :4, scientific american, 1897-11-13

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BY ARCHIBALD A. SCHENCK MEM Cram-vrA- 30VG' EMBANKMENTS' OF THE 4 Firl Frl :4, scientific american, 1897-11-13

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