lantern mantles

[Debby Steva <dps3c@watt.seas.virginia.edu>]

Dear Radsafe:

Does anyone happen to know what the typical quantity (mg, uCi, whatever)

of Th-232 is contained in one of the Coleman lantern mantles
that used to contain thorium?  What is a typical exposure rate
on contact with one?

D. Steva