[posted] Posted (#68686, Leinster) !

[Jacqueline Jeremy]

Critical difference, by Murray Leinster                                68686
  [Author: Murray Leinster]
  [Link: https://www.gutenberg.org/6/8/6/8/68686]
  [Files: 68686-0.txt; 68686-h.htm]

Thanks to Greg Weeks, Mary Meehan and the Online Distributed Proofreading
Team at http://www.pgdp.net

Regards,
Jacqueline