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Correct Ideas about Compensating Pendulums - p299
doi:10.1038/scientificamerican06051852-299b
Singular Petition to the Senate for an Appropriation - p300
doi:10.1038/scientificamerican06051852-300k
Great Improvement in the Manufacture of Salt - p301
doi:10.1038/scientificamerican06051852-301c
Iodine Rendered Soluble by Syrup of Orange Peel and Tanin - p304
doi:10.1038/scientificamerican06051852-304c