The Westinghouse Alternating Current System of Electrical Distribution - p113

doi:10.1038/scientificamerican02221890-113

PDF (391 KB)

The Panama Canal — A New Project for Its Completion - p114

doi:10.1038/scientificamerican02221890-114

PDF (401 KB)

Annual Report of the Commissioner of Patents - pp114 - 115

doi:10.1038/scientificamerican02221890-114a

PDF (494 KB)

How to Purify Drinking Water - p115

Peter T. Austen, Ph.D., F.C.S.

doi:10.1038/scientificamerican02221890-115

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An Improved Tool and Handle - p116

doi:10.1038/scientificamerican02221890-116

PDF (307 KB)

An Improved Toy for Children - p116

doi:10.1038/scientificamerican02221890-116a

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An Improved Sunshade Hat - p116

doi:10.1038/scientificamerican02221890-116b

PDF (307 KB)

An Improved Railroad Tie and Chair - p116

doi:10.1038/scientificamerican02221890-116c

PDF (307 KB)

An Improved Metallic Shingle - p116

doi:10.1038/scientificamerican02221890-116d

PDF (238 KB)

A Ridge and Hip Covering for Roofs - p116

doi:10.1038/scientificamerican02221890-116e

PDF (307 KB)

A New Aerial Apparatus - pp117 - 118

doi:10.1038/scientificamerican02221890-117

PDF (323 KB)

Simple Calls for Telephone Lines - p123

doi:10.1038/scientificamerican02221890-123

PDF (142 KB)

A Cheap Flash Lamp - p123

doi:10.1038/scientificamerican02221890-123a

PDF (236 KB)

A New Method of Electrically Driving Tuning Forks - p123

doi:10.1038/scientificamerican02221890-123b

PDF (236 KB)

New Books and Publications - p124

doi:10.1038/scientificamerican02221890-124a

PDF (369 KB)

Scientific American Building Edition - p124

doi:10.1038/scientificamerican02221890-124b

PDF (369 KB)

To Inventors - p125

doi:10.1038/scientificamerican02221890-125

PDF (311 KB)