Table of contents


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Departments

Correspondence

Correspondence p215

doi:10.1038/scientificamerican04051890-215


Recently Patented Inventions

Recently Patented Inventions p220

doi:10.1038/scientificamerican04051890-220


Books

New Books and Publications p220

doi:10.1038/scientificamerican04051890-220a


Business and Personal

Business and Personal p220

doi:10.1038/scientificamerican04051890-220c


Notes and Queries

Notes & Queries pp220 - 221

doi:10.1038/scientificamerican04051890-220d


Index

Index of Inventions pp221 - 222

doi:10.1038/scientificamerican04051890-221a


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Articles

Electro-Pneumatic Block Signal System p209

doi:10.1038/scientificamerican04051890-209


Soda Ash pp210 - 211

doi:10.1038/scientificamerican04051890-210


An Improved Alarm Lock p212

doi:10.1038/scientificamerican04051890-212


The Victor Safety Bicycle p212

doi:10.1038/scientificamerican04051890-212a


Low Water Alarm and Flue Cleaning Device for Steam Boilers p212

doi:10.1038/scientificamerican04051890-212b


An Improved Means of Channel Protection p212

doi:10.1038/scientificamerican04051890-212c


An Improved Atomizer p213

doi:10.1038/scientificamerican04051890-213


An Improved Key Fastener p213

doi:10.1038/scientificamerican04051890-213a


An Improved End Gate for Wagons p213

doi:10.1038/scientificamerican04051890-213b


A Portable Lemonade Holder and Glass Washer p213

doi:10.1038/scientificamerican04051890-213c


A Nut and Washer for Vehicle Axles pp213 - 214

doi:10.1038/scientificamerican04051890-213d


Mountains of the Moon pp217 - 218

doi:10.1038/scientificamerican04051890-217


An Improved Bridge Flooring p218

doi:10.1038/scientificamerican04051890-218


An Improved Camera p218

doi:10.1038/scientificamerican04051890-218a


Automatic Recording Signal for Railroads p219

doi:10.1038/scientificamerican04051890-219


Queen's New Triple Plate Toeplee-Holtz Machine p219

doi:10.1038/scientificamerican04051890-219a


Scientific American Building Edition p220

doi:10.1038/scientificamerican04051890-220b


To Inventors p221

doi:10.1038/scientificamerican04051890-221


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