Some of this stuff has been floating around the Internet over the past few days, but Cabinet of Wonders ties it all together:
The English-language term “Scientology” originated neither with Hubbard nor Nordenholz, but with philologist Allen Upward, who coined the term in 1907 to ridicule pseudoscientific theories.
Possibly more interestingly, is the history of the E-Meter . It was invented by chiropractor and sci-fi author Volney Mathison, based on his study of lie detectors. Mark Pilkington looked at this aspect in an article he wrote for the Guardian.