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[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. Title devised by Library staff. Forms part of Civil War photos, military construction and transportation in Northern Virginia and elsewhere / United States Mili... More

[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. Title devised by Library staff. Forms part of Civil War photos, military construction and transportation in Northern Virginia and elsewhere / United States Mili... More