...ference in the canals to be excavated is by no means so great. The Panama Canal is all excavation from one end to the other, except 11 1/2 miles of artificial lake, and is 46 miles in length. The Nicaragua route makes use of Lake Nicaragua, an inland sea which was one day connected with the Pacific and was a part of its vast expanse. The landlocked sharks of the lake are living testimonials of the fa...