SCIENTIFIC AMERICAN, New York, December 20, 1884  The front cover has "The World's Industrial and Cotton Centennial Exposition, New Orleans" with an accompanying article.  Inside the issue is: "Frankel's Registering Dynamometer"; "The Economic Motor Co.'s New Gas Engine"; "The Camel Corps of the British Army"; and more illustrations, articles and advertisements. 
Complete in sixteen pages, never bound, in very good condition.