James, John, Joseph and Fletcher Harper, founding Harper's New Monthly Magazine in 1850, dedicated it to publishing "an immense amount of useful and entertaining reading matter . . ." Last week with the July issue, Harper's changed its page sizebut not its purposefor the first time in 98 years. Frederick Lewis Allen, sixth in the succession of long-lived editors, firmly assured everybody: "We have altered our clothes but not our personality . . . We are still a magazine for people who know how to read and are willing to make the effort. . ."
Harper's had changed printers and adopted a...