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Departments

Notes and Queries

Notes and Queries p372

doi:10.1038/scientificamerican12091865-372


Correspondence

Correspondence pp372 - 373

doi:10.1038/scientificamerican12091865-372b


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Articles

Improved Air Purifier, Steel Pens, and more pp367 - 368

doi:10.1038/scientificamerican12091865-367


Latest Foreign Intelligence p369

doi:10.1038/scientificamerican12091865-369


Water-Proof Goods p370

doi:10.1038/scientificamerican12091865-370


The Progress Machine Works p370

doi:10.1038/scientificamerican12091865-370a


Recent American Patents p371

doi:10.1038/scientificamerican12091865-371


Market for the Month p372

doi:10.1038/scientificamerican12091865-372a


Emerson's Saw Tooth p374

doi:10.1038/scientificamerican12091865-374


Raising of a Wreck p374

doi:10.1038/scientificamerican12091865-374a


Improved Current Water Wheel p374

doi:10.1038/scientificamerican12091865-374b


Reynolds's Bag Holder p374

doi:10.1038/scientificamerican12091865-374c


The Difference between New and Old Ale p375

doi:10.1038/scientificamerican12091865-375


Acquiring Information p375

doi:10.1038/scientificamerican12091865-375a


Inventor's Associations and the Patent Laws p375

doi:10.1038/scientificamerican12091865-375b


An Excursion to the Coal Fields p375

doi:10.1038/scientificamerican12091865-375c


Patent Claims pp376 - 382

doi:10.1038/scientificamerican12091865-376


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