"1915 - Glass formulas delete manganese". In: Some Common Artifact Found
at Historical Sites. Cultural Resources Report No.31, USDA Forest Service,
Southwestern Region, Albuqueque, N.M., February 1980 by David Gillio,
Francis Levine, and Douglas Scott. page 17
"Manganese was used in bottle glass up to about 1917 in order to give the
glass a clearer effect. After this date, ultra-violet rays of the sun
would not turn glass "purple", a change caused by the manganese content of
the glass."
IMACS users Guide, April 1984, section 472. This is the guide to filling
out site forms for computer entry back then. It was developed in Region 4
(Utah, Nevada, and southern 2/3 of Idaho). I used it in 1983 and 1984
while working for the BLM in Salmomn, Idaho.
I don't have the orginal sources.
:-(
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.
Cathy Spude
<[log in to unmask]
GOV> To
Sent by: [log in to unmask]
HISTORICAL cc
ARCHAEOLOGY
<[log in to unmask] Subject
> manganese clarified glass date
09/22/2004 11:13
AM
Please respond to
HISTORICAL
ARCHAEOLOGY
<[log in to unmask]
>
HISTARCHers:
I'm looking for a citation for the end date of the use of manganese to
clarify glass in the United States. Dale Berge in his still relevant report
on the Simpson's Springs excavations in Utah tells us it was 1917, based on
a collector's book (Ferraro and Ferraro 1964). I have "known" for some
years now that the United States stopped importing manganese from Germany
as early as 1915 and that is a better end date for glass that solarizes
purple. I've used that date for some time now, but a reviewer on one of my
reports wants a citation (*&#!*#!!!). I've gone through all my standard
references and can't find anyone else who will back me up.
Anyone who can help?
Cathy
Catherine Holder Spude ¨ Archeologist ¨ Cultural Resources Management ¨
National Park Service – Intermountain Region ¨ 505.988.6831Voice ¨
505.988.6876 Fax
The National Park Service cares for special places saved by the American
people so that all may experience our heritage.
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