Table of contents
Recently Patented Inventions
Books
Business and Personal
Notes and Queries
Index
Patent Notes
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Hog Killing at the Chicago Stock Yards - pp291 - 292
doi:10.1038/scientificamerican11071891-291
How Stone is Crushed and Screened - pp294 - 295
doi:10.1038/scientificamerican11071891-294