Story continues in the next (non-reprint) issue (#335).
published in cooperation with the National Social Welfare Assembly
This is essentially a series of model sheets for Superman's face by Curt Swan. It's a guide to Superman's features showing Superman's face from every angle and undergoing every expression. DC encouraged readers to figure out what emotion each picture represented and mail in their guesses to the letter column.
This is NOT reprinted in Superman (DC, 1939 series) #245, although that page is similar in content.
Letters from Cliff Taylor, Sammy Fales, Stanley Wilcox, Al Taylor, Vip Short, Pete Taylor, Gwen Harding, and Joe Willis.
In one answer, the editor announces a Superman musical, with a tentative title of "It's Superman", produced by David Merrick and with music by the team that turned out "Bye Bye, Birdie" and "Golden Boy" (Charles Strouse and Lee Adams). The cast hadn't been announced yet, although "rumor has it that Steve Allen may play Clark Kent."
In another answer, the editor says that they are considering a solo Supergirl title, particularly if the upcoming Supergirl 80-Page Giant were to sell out.