Before revision: Companies The Johnson Smith Company placed advertisements for gadgets and toys that appeared on the back cover of many historically significant comic books, including Action Comics #1 (June 1938) ( first appearance of the character Superman) and Detective Comics #27 (May 1939) ( first appearance of the character Batman).
After revision: thetheCompanies The Johnson Smith Company placed advertisements for gadgets and toys that appeared on the back cover of many historically significant comic books, including Action Comics #1 (June 1938) ( first appearance of the character Superman) and Detective Comics #27 (May 1939) ( first appearance of the character Batman).