It is a reflex style water glass for a steam boiler.  These were used most often on locomotive boilers in logging contexts.  

Best,

Stathi

---------------

Efstathios I Pappas, MS
Curator of Collections
Northwest Railway Museum
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Sent from my iPhone

> On Jul 6, 2015, at 4:19 PM, Williams, Scott <[log in to unmask]> wrote:
> 
> Hi all,
> 
> We recently found an unusual glass artifact associated with an early to mid- 20th Century logging town that was used as a sanitarium after the mill shut down, and refuse deposits from the two periods are mixed.
> 
> We've put some pictures of the glass artifact on our website- if anyone has any idea what this might have been used for or a part of, we'd love to know:
> 
> http://www.wsdot.wa.gov/Environment/CulRes/Compliance.htm
> 
> Dimensions are on the website-it's a thick, oval-shaped bar of clear glass, with ridges molded on one side and "Made in Germany"  etched on the other.  It looks like something industrial-a lens for some kind of light, perhaps, but we haven't seen anything like it before.
> 
> Thanks,
> 
> Scott S. Williams
> Cultural Resources Program Manager, WSDOT
> Ph: 360.570.6651
> Mobile: 360.485.5350
> [log in to unmask]<mailto:[log in to unmask]>
> WSDOT Cultural Resources Program<http://www.wsdot.wa.gov/Environment/CulRes/default.htm> on the Web
> 
> "Development is not stifled by history, but enriched by it."