| Here is the first 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 1. |
| Date:
10/7/1911 |
Location:
Altoona, PA Map  |
Views:
83 |
Collection Of:
 
Thomas C. Ayers |
|
Author: Thomas C. Ayers
|
 |
| Picture Categories: |
This picture is part of album: PRR: "Testing Materials" ~ October 1911 |