levelage

— Since connection was made by levelage with German main shaft, a large body of ore has been opened which is being backstoped.^([sic])

— The surface of Lake Erie has generally been considered as five hundred and sixty-four feet above tide-water at Albany; see the Report of Michigan, 1839-40. The topographer of that State, S.W. Higgins, Esq., puts it at 565, 333 feet. If this last number represents the levelage of the Erie Canal, it is probably good for the surface of the Lake, as it was when the surveys were made for that work, twenty-five years since.