![[Third series of experiments with board trusses-shows the east end of the bridge after it had been tested]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMTUvdGhpcmQtc2VyaWVzLW9mLWV4cGVyaW1lbnRzLXdpdGgtYm9hcmQtdHJ1c3Nlcy1zaG93cy10aGUtZWFzdC1lbmQtb2YtdGhlLWJyaWRnZS04ZDRlYTEtMTAyNC5qcGc%3D/40/31/webp "[Third series of experiments with board trusses-shows the east end of the bridge after it had been tested]")
[Third series of experiments with board trusses-shows the east end of ...
No. 40 (handwritten) and 2541 (stamped) on mount. Forms part of Civil War photos, military construction and transportation in Northern Virginia and elsewhere / United States Military Railway Department (Librar... More
![[Third series of experiments with board trusses-shows the west end of the bridge, after the experiments had been completed and the vertical boards removed to show the results]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMjEvdGhpcmQtc2VyaWVzLW9mLWV4cGVyaW1lbnRzLXdpdGgtYm9hcmQtdHJ1c3Nlcy1zaG93cy10aGUtd2VzdC1lbmQtb2YtdGhlLWJyaWRnZS1iOWU5NTktMTAyNC5qcGc%3D/40/31/webp "[Third series of experiments with board trusses-shows the west end of the bridge, after the experiments had been completed and the vertical boards removed to show the results]")
[Third series of experiments with board trusses-shows the west end of ...
No. 39 (handwritten) and 2540 (stamped) on mount. Forms part of Civil War photos, military construction and transportation in Northern Virginia and elsewhere / United States Military Railway Department (Librar... More
![[Third series of experiments with board trusses-shows appearance of bridge, after 168,000 lbs., in addition to the weight of the bridge, had stood on it for nine hours]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMDUvdGhpcmQtc2VyaWVzLW9mLWV4cGVyaW1lbnRzLXdpdGgtYm9hcmQtdHJ1c3Nlcy1zaG93cy1hcHBlYXJhbmNlLW9mLWJyaWRnZS1hZnRlci02MGU5ZDYtMTAyNC5qcGc%3D/40/31/webp "[Third series of experiments with board trusses-shows appearance of bridge, after 168,000 lbs., in addition to the weight of the bridge, had stood on it for nine hours]")
[Third series of experiments with board trusses-shows appearance of br...
No. 38 (handwritten) and 2539 (stamped) on mount. Forms part of Civil War photos, military construction and transportation in Northern Virginia and elsewhere / United States Military Railway Department (Librar... More
![[Third series of experiments with board trusses-shows the east end of the bridge after it had been tested]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMTUvdGhpcmQtc2VyaWVzLW9mLWV4cGVyaW1lbnRzLXdpdGgtYm9hcmQtdHJ1c3Nlcy1zaG93cy10aGUtZWFzdC1lbmQtb2YtdGhlLWJyaWRnZS0yMzJjNzctMTAyNC5qcGc%3D/40/30/webp "[Third series of experiments with board trusses-shows the east end of the bridge after it had been tested]")
[Third series of experiments with board trusses-shows the east end of ...
No. 40 (handwritten) and 2541 (stamped) on mount. Forms part of Civil War photos, military construction and transportation in Northern Virginia and elsewhere / United States Military Railway Department (Librar... More
![[Third series of experiments with board trusses-shows the west end of the bridge, after the experiments had been completed and the vertical boards removed to show the results]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMjEvdGhpcmQtc2VyaWVzLW9mLWV4cGVyaW1lbnRzLXdpdGgtYm9hcmQtdHJ1c3Nlcy1zaG93cy10aGUtd2VzdC1lbmQtb2YtdGhlLWJyaWRnZS05MjA4MGMtMTAyNC5qcGc%3D/40/31/webp "[Third series of experiments with board trusses-shows the west end of the bridge, after the experiments had been completed and the vertical boards removed to show the results]")
[Third series of experiments with board trusses-shows the west end of ...
No. 39 (handwritten) and 2540 (stamped) on mount. Forms part of Civil War photos, military construction and transportation in Northern Virginia and elsewhere / United States Military Railway Department (Librar... More
![[Third series of experiments with board trusses-shows appearance of bridge, after 168,000 lbs., in addition to the weight of the bridge, had stood on it for nine hours]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMDUvdGhpcmQtc2VyaWVzLW9mLWV4cGVyaW1lbnRzLXdpdGgtYm9hcmQtdHJ1c3Nlcy1zaG93cy1hcHBlYXJhbmNlLW9mLWJyaWRnZS1hZnRlci00NTE1NmYtMTAyNC5qcGc%3D/40/30/webp "[Third series of experiments with board trusses-shows appearance of bridge, after 168,000 lbs., in addition to the weight of the bridge, had stood on it for nine hours]")
[Third series of experiments with board trusses-shows appearance of br...
No. 38 (handwritten) and 2539 (stamped) on mount. Forms part of Civil War photos, military construction and transportation in Northern Virginia and elsewhere / United States Military Railway Department (Librar... More