The East River Bridge...

SCIENTIFIC AMERICAN, New York, April 6, 1878  Most of the front page is taken up with 3 illustrations: "The Great Suspension Bridge Between New York & Brooklyn --The Bridge Entrance N.Y. Side" showing a view of the bridge 5 years before completion. Good text accompanies it as well. 
Also within the issue is: 'The Brownshill Brick-making Machine"; "The Eclipse Semi-Portable Engine"; "A Beton Fountain Prospect Park Brooklyn"; and additional articles, illustrations and advertisements.
This is complete in 16 pages and is in nice condition.