Table of contents
December 9, 1865, Volume 13 No 24 (New Series) pp367-382
About the coverCorrespondence
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Top of pageArticles
Improved Air Purifier, Steel Pens, and more - pp367 - 368
doi:10.1038/scientificamerican12091865-367
Inventor's Associations and the Patent Laws - p375
doi:10.1038/scientificamerican12091865-375b