Image: Cliffs Shaft obelisk
Size of this preview: 378 × 599 pixels. Other resolutions: 151 × 240 pixels | 453 × 718 pixels.
Original image (453 × 718 pixels, file size: 56 KB, MIME type: image/jpeg)
Description: Cliffs Shaft mine head frame, Ishpeming MI
Title: Cliffs Shaft obelisk
Credit: Building Reinforced-Concrete Shaft Houses, in Proceedings of the Lake Superior Institute annual meeting, V22
Author: J. Ellzey Hayden and Lucien Eaton
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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