The Utilization of Knowledge - p240

doi:10.1038/scientificamerican04161881-240

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The American Fish Culturists' Convention - p240

doi:10.1038/scientificamerican04161881-240a

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Pigs and Babies - pp240 - 241

doi:10.1038/scientificamerican04161881-240b

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Charges for Handling Grain in New York Harbor - p241

doi:10.1038/scientificamerican04161881-241

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The International Exhibition of Electricity at Paris, 1881 - p241

doi:10.1038/scientificamerican04161881-241a

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An Invention Wanted for Utilizing Flax Refuse - p241

doi:10.1038/scientificamerican04161881-241b

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New Embroidering Frame - p242

doi:10.1038/scientificamerican04161881-242

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New Perforating Machine - p242

doi:10.1038/scientificamerican04161881-242a

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American Industries.—No. 71 - pp243 - 244

doi:10.1038/scientificamerican04161881-243

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The Reese Fusion Disk - p244

doi:10.1038/scientificamerican04161881-244

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The Velocipede Hand Car - p246

doi:10.1038/scientificamerican04161881-246

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Improved Refrigerator - p246

doi:10.1038/scientificamerican04161881-246a

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Miscellaneous Inventions - p246

doi:10.1038/scientificamerican04161881-246b

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Simplified Holtz Electrical Machine - pp247 - 248

Geo M. Hopkins

doi:10.1038/scientificamerican04161881-247

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Mechanical Inventions - p249

doi:10.1038/scientificamerican04161881-249

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Lavater's Apparatus for Taking Silhouettes - p249

doi:10.1038/scientificamerican04161881-249a

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