SCIENTIFIC AMERICAN, New York, February 20, 1875 The front page of this issue features "The Proposed Niagara Bridge at Lewiston, N.Y." and an associated article. Inside the issue is: a text article "Flying Machines"; "Irrigation in Colorado - Letting Water Into a Sluice Way"; "Measuring Mountains"; "Cameron's Plenum and Vacuum Pump"; "Hayden's Revolving Cartridge Belt"; "The Hairy Faced Burmese Family"; and additional articles and advertisements.

This is complete in 16 pages with several small binding holes along the left spine, otherwise in good condition.