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Carter's Ditching and Excavating Machine - p245
doi:10.1038/scientificamerican04191890-245c
Climbing the Great Chimney of the Clark Thread Works, at Harrison, N. J. - p246
doi:10.1038/scientificamerican04191890-246
The Scientific use of the Phonograph - p248
Geo. M. Hopkins, By
doi:10.1038/scientificamerican04191890-248