Sholes and Glidden typewriter length. The redesigned platen also introduced the modern spacing functionality (horizontal and axial movement providing letter and line spacing, respectively). The cylindrical platen became "an indispensable part of every standard [typewriter]". By the end of 1872, the appearance and function of the typewriter had assumed the form that would become standard in the industry and remain largely unchanged for the next century. Although the machine possessed a cylindrical platen and what was essentially a QWERTY keyboard, two design elements that would later become essential were lacking: the ability to write in upper and lowercase letters and "visible" print. Although the
Typewriter in the Sky abridged version of the story and ran two hours thirty minutes in duration. L. Ron Hubbard's literary agency Author Services Inc. announced that "Typewriter in the Sky" would be included in "a 12-volume series of 23 classic science fiction and fantasy novels and short stories" published by Easton Press of Norwalk, Connecticut in September 1995. In 2008 Heritage Auctions, Inc. valued a rare combined copy of "Typewriter in the Sky" and "Fear" at between US$100 and $200. Daniel Cohen wrote in "Masters of the Occult" (1971) that works including "Typewriter in the Sky", "Fear", and "Slaves of Sleep" "moved Hubbard