Table of contents


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Departments

Correspondence

Correspondence p325

doi:10.1038/scientificamerican11191887-325


Business and Personal

Business and Personal p331

doi:10.1038/scientificamerican11191887-331d


Index

Index of Inventions pp331 - 332

doi:10.1038/scientificamerican11191887-331f


Patent Notes

Patents p334

doi:10.1038/scientificamerican11191887-334


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Articles

International Union for the Protection of Industrial Property p320

doi:10.1038/scientificamerican11191887-320


The Geneva Non-Magnetic Watch p320

doi:10.1038/scientificamerican11191887-320a


Photographic Notes p321

doi:10.1038/scientificamerican11191887-321


Improved Construction of Grain Elevators p322

doi:10.1038/scientificamerican11191887-322


An Improved Ore Jigger p322

doi:10.1038/scientificamerican11191887-322a


An Improved Violin Tuning Peg p322

doi:10.1038/scientificamerican11191887-322b


An Improved Vermin Exterminator p322

doi:10.1038/scientificamerican11191887-322c


An Improved Shoemaker's Pegging Jack p323

doi:10.1038/scientificamerican11191887-323


Compressed Air Locomotive for Underground Haulage p323

doi:10.1038/scientificamerican11191887-323a


An Improved Railroad Signal p323

doi:10.1038/scientificamerican11191887-323b


Our New Navy p324

doi:10.1038/scientificamerican11191887-324


The New Jersey Ballot Box p326

doi:10.1038/scientificamerican11191887-326


Otto Von Guericke's Vacuum Gun pp326 - 327

T. O'conor Sloane, Ph.D.

doi:10.1038/scientificamerican11191887-326a


New Isochronal Clock pp327 - 328

doi:10.1038/scientificamerican11191887-327


The Volcano of Kluchi or Kluchefskaya, Kamschatka p329

doi:10.1038/scientificamerican11191887-329


Pneumatic Speed Indicator pp329 - 330

doi:10.1038/scientificamerican11191887-329a


Engineering Inventions p331

doi:10.1038/scientificamerican11191887-331


Agricultural Inventions p331

doi:10.1038/scientificamerican11191887-331a


Miscellaneous Inventions p331

doi:10.1038/scientificamerican11191887-331b


Special p331

doi:10.1038/scientificamerican11191887-331c


To Inventors p331

doi:10.1038/scientificamerican11191887-331e


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