I came across some interesting about free online books,
thousands of them, almost none on jewellery, but a couple of related
ones. I am sure there are more if you dig.
Here is Cellini's autobiography (the man was really kind of an
immoral creep, but he was a pretty good goldsmith and entrepreneur).
Here are downloadable versions of the same book.
Gold Mining book
Book on oxy-acetylene welding and working steel.
A page of lots of online books on art:
Article on google's deal with major world libraries to add millions
of online books.
Project Guttenberg - one of the oldest of these repositiories.
The one million books Project:
3000+ online books (NAP)
76,000+ books at the net library
Charles Lewton-Brain/Brain Press
President, Canadian Crafts Federation
Box 1624, Ste M, Calgary, Alberta, T2P 2L7, Canada