Model railroad track ... rail weight on Class 1 railroads was 82.8 pounds; by 1956 it was 105 pounds. Rail at 132 pounds was used on heavy-traffic lines by the 1940s, and the Pennsylvania Railroad ...

whose work from the 1890s - 1940s captured the PNW’s transformation. Curtis documented logging, railroads, and growth, advocating for industry while also fighting to preserve wilderness like Mt.