File:Britannica Glass Siemens Furnace.png

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Original file ‎(1,681 × 743 pixels, file size: 96 KB, MIME type: image/png)

Description
English: Illustration of a Siemens continuous tank glass furnace (two cross-sectional views).
Date published 1911
Source Encyclopædia Britannica, 11th ed., Vol. 12, p. 87
Author Unknown authorUnknown author
Permission
(Reusing this file)
Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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743819dd4fdec5e592e88e92a474428098c9821c

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current14:34, 24 September 2009Thumbnail for version as of 14:34, 24 September 20091,681 × 743 (96 KB)Bob Burkhardt{{Information |Description={{en|1=Illustration of a Siemens continuous tank glass furnace (two cross-sectional views).}} |Source=Encyclopædia Britannica, 11th ed., Vol. 12, p. 87 |Author=unknown |Date=published 1911 |Permission={{PD-Britannica}} |other_v
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