Selenium was used as a clalrifying agent AFTER the supplies of Manganese
ran out.  On top of that, not everybody used it.  On top of that, those
that did did so for varying lengths of time.  It creates another kind of
solorized glass - Amber.  This was discarded in the depression era since it
was cheaper to color glass than clarify it.

Time to offer a rare opinion: There is a special place in perdition for
whoever came up with that "Lima Beans through a Baby" green color so
popular in the depression.

:-(


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.




             Carl Barna
             <[log in to unmask]
             ov>                                                        To
             Sent by:                  [log in to unmask]
             HISTORICAL                                                 cc
             ARCHAEOLOGY
             <[log in to unmask]                                     Subject
             >                         Re: manganese clarified glass date


             09/22/2004 02:51
             PM


             Please respond to
                HISTORICAL
                ARCHAEOLOGY
             <[log in to unmask]
                     >






I thought the purple color was caused by Selenium, the supply of which was
cut off by WW I.

Carl "Slow Digger' Barna
Regional Historian
BLM Colorado State Office