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Receipts of the Paris Exhibition; American Reapers - p139
doi:10.1038/scientificamerican01121856-139b
Compressed Air Engines for City Railroads - p139
doi:10.1038/scientificamerican01121856-139f
Report of the Secretary of the Interior - p141
doi:10.1038/scientificamerican01121856-141
Award of the Scientific American Prizes - p141
doi:10.1038/scientificamerican01121856-141a
Water Descending and Hot Air Ascending - p141
doi:10.1038/scientificamerican01121856-141c
A New and Improved System of Numeration and Measurement - p142
doi:10.1038/scientificamerican01121856-142
