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Cracker and Biscuit Rolling and Cutting Machine - p305
doi:10.1038/scientificamerican06151850-305e
The Patent Office, and Reform of the Patent Laws - p307
doi:10.1038/scientificamerican06151850-307
The Use of Oxide of Zinc is not Injurious to Health - p307
doi:10.1038/scientificamerican06151850-307c
Improvement on Hanging Brakes for Railroad Cars and other Machinery - p308
doi:10.1038/scientificamerican06151850-308d
Patent Case—India Rubber Pontoon Boat - pp309 - 310
doi:10.1038/scientificamerican06151850-309e
The Solvent Properties of Caloric, Similar to Acid Gases - p310
doi:10.1038/scientificamerican06151850-310a
History of Propellers and Steam Navigation - p312
doi:10.1038/scientificamerican06151850-312a
