Table of contents
September 18, 1909, Volume 101 No 12 pp190-203
About the coverRecently Patented Inventions
Patent Notes
Index
Top of page
Top of pageArticles
The Composition of the Upper Atmosphere - p190
doi:10.1038/scientificamerican09181909-190b
An Automatic Electric Fog-Signaling Apparatus for Railroads - p192
doi:10.1038/scientificamerican09181909-192
Portable Outlooks for Artillery Trains - pp193 - 194
Alfred Gradenwitz
doi:10.1038/scientificamerican09181909-193
Early Suggestions of Invading England by Balloon - p195
doi:10.1038/scientificamerican09181909-195b
Commander Peary's Discovery of the North Pole - pp196 - 197
doi:10.1038/scientificamerican09181909-196
How Cook made his Latitude Observations - pp197 - 198
doi:10.1038/scientificamerican09181909-197
The Cold Process of Making Sirup - p199
Thaleon Blake
doi:10.1038/scientificamerican09181909-199a
Vise for Polished Pipe - p199
A. V. Searing, Jr.
doi:10.1038/scientificamerican09181909-199b
A Cheap Lamp Rheostat - p199
F. P. M'dermott, Jr.
doi:10.1038/scientificamerican09181909-199e
