Now days, we discuss mineral oils on boxes which light up.
Then, we burp, fart, and scratch our butts. Not much has
changed.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"E Z Peaces" wrote in message
...

A century ago, mineral oils were favored because they
wouldn't gum and
wouldn't cause fires by spontaneous combustion. Often,
vegetable or
animal fats were added to improve lubricating qualities.
Then there
could be gumming.

Vegetable and animal fats contained fatty acids that could
corrode
metal. Depending on how it was refined, mineral oil could
also contain
acid.

I wonder how much has changed.