Oh...I FOUND it.  18 rows down, far right image...right?
Thanks.  Wouldnt have been able to imagine How it was used.



-----Original Message-----
From: Stathi Pappas <[log in to unmask]>
To: HISTARCH <[log in to unmask]>
Sent: Wed, Jul 8, 2015 2:57 pm
Subject: Re: Looking for help ID'ing a glass artifact


As for seeing water levels in a reflex gauge the ridges make it easier to see as
in:

http://www.scpc2.com/boiler.html#PhotoSwipe1436392335670

Photo being
taken on my locomotive during construction.   

Best,

Stathi

Efstathios
I Pappas, MS
Curator of Collections
Northwest Railway Museum

Sent from my
iPhone