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Recently Patented Inventions
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Revival of the Second-Class Mail Matter Question - p114
doi:10.1038/scientificamerican02241900-114
An Assumed Inconstancy in the Level of Lake Nicaragua; A Question of Permanency of the Nicaragua Canal - p115
Angelo Heilprin, F.R.G S.; F.G.S.A.
doi:10.1038/scientificamerican02241900-115
Two Forms of a New Dish-Washing Machine - p116
doi:10.1038/scientificamerican02241900-116
The Progress of Practical Aeronautics during 1899 - p117
doi:10.1038/scientificamerican02241900-117
The Round-Lap Bale Method of Shipping Cotton - pp120 - 122
D. Allen Willey
doi:10.1038/scientificamerican02241900-120
An Improved Apparatus for Raising Liquids - p122
doi:10.1038/scientificamerican02241900-122a