Image: 1886 diagram varied lenses
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Description: Cross-section of a vault light Original caption: Hayward's No.2 B light, with water bar
Title: 1886 diagram varied lenses
Credit: 1886 Laxton's Price Book, scanned and posted by Ian Macky [1]
Author: Hayward Brothers
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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