I came across this curious paragraph in the May, 1914 edition of
Edison Phonograph Monthly (page 61):
To clean an Edison Disc record make a suds of luke-warm water with Ivory or Pears' soap and wash the record thoroughly as you would a dish. Wipe the record dry with a cloth that has been wrung from clear water, in order to remove all traces of the suds; then dry thoroughly, but not by intense heat — preferably in a draft of air."
When I wash a dish, I immerse it. I can't imagine that would be a good idea with a Diamond Disc, but there you have it — the factory recommended it.
