Category:University of Illinois Engineering Experiment Station

Subcategories

This category has the following 2 subcategories, out of 2 total.

Media in category "University of Illinois Engineering Experiment Station"

The following 4 files are in this category, out of 4 total.

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  AdvancingLongwall.png 516 × 762; 94 KB
  
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  Bulletin (1904) (14783799362).jpg 3,614 × 2,086; 676 KB
  
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  OldRoomAndPillar.png 1,313 × 837; 174 KB
  
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  RetreatingLongwall.png 768 × 821; 60 KB