Table of contents
September 28, 1867, Volume 17 No 13 pp193-208
About the coverBusiness and Personal
Patent Notes
Top of page
Top of pageArticles
Method of Regulating the Speed of Wind Wheels, Mystery of the Great Pyramids, and more - p193
doi:10.1038/scientificamerican09281867-193
Vogelmann's Combined Step and Extension Ladder - p197
doi:10.1038/scientificamerican09281867-197b
Recent American and Foreign Patents - pp198 - 199
doi:10.1038/scientificamerican09281867-198
Producing a Vacuum in Guns before Firing - p200
doi:10.1038/scientificamerican09281867-200c
Engines and Boilers—Hydrogen in Boilers, Burning Boilers, Setting Boilers - p201
doi:10.1038/scientificamerican09281867-201
