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Pulling Jack, sketched for Solomon Willard's book of 1843 on Monument.
Pulling Jack, sketched for Solomon Willard's book of 1843 on the monument. This machine was contrived and first used at the Bunker Hill quarry in Quincy. The power is about ten tons or with the addition of a sh... More
Sketch from Solomon Willard's book of 1843, showing underground founda...
Sketch from Solomon Willard's book of 1843, showing underground foundation 12 ft. deep and 50 ft. square for Bunker Hill Monument which as declared July 5, 1825 five weeks after the laying of the cornerstone, w... More