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Improved Coupling for Pipes and other Pur - p241
doi:10.1038/scientificamerican04171852-241c
Testimony to the Value of the Meat Biscuit - p243
doi:10.1038/scientificamerican04171852-243b
Monument to the Founder of the Smithsonian Institute - p243
doi:10.1038/scientificamerican04171852-243h
Paine's Patent System of Ventilating Railroad Cars - p244
doi:10.1038/scientificamerican04171852-244g