Important Tests to be made of Heavy Armor Plating - pp160 - 162

doi:10.1038/scientificamerican09131890-160

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An Artificial Lake and Water Slide - p162

doi:10.1038/scientificamerican09131890-162

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An Improvement in Locks and Keys - p162

doi:10.1038/scientificamerican09131890-162a

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A Convenient Sponge for Cleaning Slates - p162

doi:10.1038/scientificamerican09131890-162b

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An Improved Slide Valve for Engines - p163

doi:10.1038/scientificamerican09131890-163

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A Coal Elevator for Railway Service - p163

doi:10.1038/scientificamerican09131890-163a

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An Improved Knife Sharpener and Polisher - p163

doi:10.1038/scientificamerican09131890-163b

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The Meeting of the Great Shields of the St. Clair River Railway Tunnel - p164

doi:10.1038/scientificamerican09131890-164

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Photographic Notes - p164

doi:10.1038/scientificamerican09131890-164a

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Work of Amateur Electricians - p165

doi:10.1038/scientificamerican09131890-165a

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A Swinging Hydraulic Capstan - p166

doi:10.1038/scientificamerican09131890-166

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New Form of Towing Steamers - p166

doi:10.1038/scientificamerican09131890-166a

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The Kola Nut - p167

Nicolas Pike

doi:10.1038/scientificamerican09131890-167

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Killing Large Sunfish with Firearms - p167

doi:10.1038/scientificamerican09131890-167a

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Engine Pounding—Ways of Stopping It - p168

doi:10.1038/scientificamerican09131890-168

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The Scientific Use of Common Things - pp169 - 170

doi:10.1038/scientificamerican09131890-169

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To Inventors - p171

doi:10.1038/scientificamerican09131890-171a

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