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Recently Patented Inventions
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The Painting Machines at the World's Fair - p257
doi:10.1038/scientificamerican04291893-257
The World's Columbian Exposition - pp258 - 259
doi:10.1038/scientificamerican04291893-258
Notes from the Worlds Columbian Exposition Chicago 1893 - pp259 - 260
doi:10.1038/scientificamerican04291893-259
An Automatic Sprinkler to Put out Fires - p261
doi:10.1038/scientificamerican04291893-261b
The Columbus Celebration, New York - pp264 - 265
doi:10.1038/scientificamerican04291893-264
Experiments with Soap Bubbles - p266
T. O'conor Sloane, Ph.D.
doi:10.1038/scientificamerican04291893-266