ae [NUMBER 48. VOLUME IX.) ™ SOIENTIFIO AMERICAN, … Chicago River as proposed by the American The lower basin is station- Sub-Marine Tunnel Company of New York. It ary, but by the revolving cap, A, the balls are ro- frame, and the basins rests on the sleepers, I I; view, figure 1, and a vertical cection, figure 2, is to be finished by May 1st, 1855,…
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