That may be possible.  Researching Manganese for that site report, I could
not find any reference for Manganese stock piles.  Henry Ford had mines,
ore and other ships, lumber yards, logging operations, rubber plantations,
glass factories, ect., so that he controled his complete line of supply for
all materials used in manufacturing Ford automobiles.   One of the
educational channels has a great biography on him which includes the
complexity of his factories and operations.  One of the reasons he wanted
to control his sources of supply was that during WW I, manufacturers found
that nothing was overstocked and supplies of everything could and did run
out.

For a manufactuer to keep many years supply of any material is not cost
effective in any business.  If the glass manufacturers did this, I would be
very eager to know the reason.  I will have to respectfully disagree with
Richard on this one.

Smoke.


Smoke (Michael A.) Pfeiffer, RPA
Ozark-St. Francis National Forests
605 West Main Street
Russellville, Arkansas 72801
(479) 968-2354  Ext. 233
e-mail:  [log in to unmask]

It is easier to get forgiveness than permission.




                    Ron May
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                    01/24/02
                    10:00 AM
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Yes, selenium...I had forgotten the yellowing mineral. But, Richard Fike
cautions that American glass makers had large supplies of manganese that
stretched out to the end of World War I or even 1920. The key to dating
broken glass from the World War I period is to find both amethyst tint and
straw-colored (yes, from the breaks side) glass in the same deposit. If
your feature lacks amethyst tint and the yellow-tint glass, then it is
probably later.

Ron May
Legacy 106, Inc.