SCIENTIFIC AMERICAN, New York, March 12, 1870  The front page has "Viaduct on the Paris and Orleans Railway, France" with an accompanying article. Inside the issue is: "The Measurement of Power -- Emerson's Dynamometer"; "Testing the Power of Turbine Water Wheels"; "Jerome B. King's Self-adjusting Double Washer"; and more illustrations, articles and advertisements.
Complete in sixteen pages, never bound, two punched holes in the left margin, otherwise is in nice condition.