| Here is the fifth of five frames of a two-page cover article entitled "Testing Materials Of Construction: How The Pennsylvania Railroad Guards Against Loss By Poor Materials." It was published originally in Supplement No. 1866 of the "Scientific American" dated 07 October 1911, page 2. |
| Date:
10/7/1911 |
Location:
Altoona, PA Map  |
Views:
7 |
Collection Of:
 
Thomas C. Ayers |
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Author: Thomas C. Ayers
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| Picture Categories: |
This picture is part of album: PRR: "Testing Materials" ~ October 1911 (R) |