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Senator James’ New Patent Law.—A New Political Machine - p307
doi:10.1038/scientificamerican06071856-307
The McCormick Reaper Patent Extension Refused - p307
doi:10.1038/scientificamerican06071856-307c
Sickles' Cut-Off Patent Expired, and an Extension Refused - p309
doi:10.1038/scientificamerican06071856-309a
Notes on Ancient and Curious Inventions.—No. 8 - p309
doi:10.1038/scientificamerican06071856-309c
