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An Improved Balance Piston Ring Packing - p227
doi:10.1038/scientificamerican04141888-227a
An Improved Draft Attachment for Plows - p227
doi:10.1038/scientificamerican04141888-227c
An Improved Device for Renovating Garments - p228
doi:10.1038/scientificamerican04141888-228c
Experiments Illustrating the Principle of the Dynamo - p233
Geo. M. Hopkins
doi:10.1038/scientificamerican04141888-233