 | Thomas Jefferson - 2004 - 178 Seiten
...of the mass, at the summit of the arch, about 40 feet. A part of this thickness is constituted by a coat of earth, which gives growth to many large trees....hill on both sides, is one solid rock of lime-stone. Though the sides of this bridge are provided in some parts with a parapet of fixed rocks, yet few men... | |
 | David Tucker - 2008 - 182 Seiten
...entirely obscured. Nor did Jefferson's final bit of geometrical description render the particular bridge. "The arch approaches the semielliptical form; but...the arch is many times longer than the transverse." Jefferson's first description of the bridge renders it remote and abstract. We cannot immediately visualize... | |
 | Eli Bowen - 1855 - 442 Seiten
...the mass, at the summit of the arch, about forty feet. A part of this thickness is constituted by a coat of earth, which gives growth to many large trees....is one solid rock of limestone. The arch approaches that we had to halt often to take breath. As we approached the summit, the trees were all of a stumpish... | |
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Its breadth in the middle, is about 60 feet, but more at the ends, and the thickness of the mass at the summit of the arch, about 40 feet. A part of this thickness is constituted by a coat of earth, which gives growth to many large trees. The residue,... 
