"An' after he studies at night, why -- it'll be nice, an' he tore a page outa Western Love Stories, an' he's gonna send off for a course, 'cause it don't cost nothin' to send off. Says right on that clipping. I seen it. An', why -- they even get you a job when you take that course -- radios, it is, nice clean work, and a future."That's Rose of Sharon speaking of her hopes for the future with her husband Connie, in John Steinbeck's The Grapes of Wrath (1939).
Above, part of an ad from Popular Mechanics (June 1938).
From the same issue of Popular Mechanics: Alkalize with Alka-Seltzer, "MONEY MAKING FORMULAS," A mystery EXchange name.