4th Order Lens

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File Type:
jpg (image/jpeg)
Document Type:
Collection / Donor:
Year of Photo / Document:
2013
Creator:
Macbeth-Evans Glass Company
Source / Citation:
Thomas Tag
Restricted Use:
No
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Comments

Fixed 4th order Fresnel lens - This 4th order fixed Fresnel lens is believed to be from the Libby Island Light. It is very significant  because it was manufactured by Macbeth-Evans Glass Company, Pittsburgh, PA. It is one of only 27 4th order lenses made by Macbeth-Evans for the US Lighthouse Service.

Entered by:
donna
Entered Date:
Feb 02, 2020

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