Table of contents
Notes and Queries
Recently Patented Inventions
Business and Personal
Index
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Important Tests to be made of Heavy Armor Plating - pp160 - 162
doi:10.1038/scientificamerican09131890-160
A Convenient Sponge for Cleaning Slates - p162
doi:10.1038/scientificamerican09131890-162b
An Improved Knife Sharpener and Polisher - p163
doi:10.1038/scientificamerican09131890-163b
The Meeting of the Great Shields of the St. Clair River Railway Tunnel - p164
doi:10.1038/scientificamerican09131890-164
The Scientific Use of Common Things - pp169 - 170
doi:10.1038/scientificamerican09131890-169