Amazing Stories Quarterly, Summer 1928

This issue of Amazing Stories Quarterly contains "The Sunken World" by Stanton A. Cobleuntz, a science-fiction serial depicting the disappearance and discovery of the USS X-111, an experimental undersinkable submarine launched in 1918. The vessel, a 200-foot steel tube equipped with unprecedented water-piercing searchlights invented by Walter Tamrock, vanishes while commissioned to combat German U-boats. Seven years later, a mysterious bearded stranger with a greenish complexion claims to be a survivor, providing evidence through fingerprints and handwriting that proves his identity. The editorial framing notes the story's originality in reimagining Atlantis as having possessed advanced scientific knowledge—electricity and radio—cyclically rediscovered across ages, using the premise to critique humanity's misuse of technological power. The magazine includes advertisements for Nestler Tire Servicing franchises and Houdini's spiritualist exposé, plus reader-contest information offering $50 for editorial submissions on science-fiction themes.