July 27, 1871: Full size section of wrought iron longitudinal beam and steel rail used in construction of railway, including table of lengths of beams for centre and side spans.
view Flash version
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8
Secrets of a Master Builder Home | The Film & More | Special Features | Timeline | Gallery | People & Events | Teacher's Guide
The American Experience | Feedback | Search & Site Map | Shop | Subscribe | Web Credits
© New content 1999-2000 PBS Online / WGBH
Exclusive Corporate Funding is provided by: