Table of contents
February 15, 1862, Volume 6 No 7 (New Series) pp97-112
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Improved Hotel Annunciator, Making Steel from Iron with Gas - p97
doi:10.1038/scientificamerican02151862-97
Surface Condensers for Steam Engines - p100
doi:10.1038/scientificamerican02151862-100a
History of the Heliographic Art in Europe and America - pp103 - 104
M. A. Root
doi:10.1038/scientificamerican02151862-103
The Comparative Economy of Steam and Water Power - p106
doi:10.1038/scientificamerican02151862-106b
Salting Streets—The Science of the Question - p107
doi:10.1038/scientificamerican02151862-107
Notes on Foreign Inventions and Discoveries - p108
doi:10.1038/scientificamerican02151862-108a
Mayhew's Patent Kerosene Lamp - p112
doi:10.1038/scientificamerican02151862-112
