Improved Portable Duilroad. Drying Effect of Fir Trees upon Soil. Shad Propagation. PETELERS' PORTABLE RAILROAD. . . IMPROVEMENT IN COAL SCUTTLES., scientific american, 1869-07-31
Improved Portable Duilroad. Drying Effect of Fir Trees upon Soil. Shad Propagation. PETELERS' PORTABLE RAILROAD. . . IMPROVEMENT IN COAL SCUTTLES., scientific american, 1869-07-31
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