Table of contents


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Contents

Correspondence

Correspondence p134

doi:10.1038/scientificamerican02271869-134


Business and Personal

Business and Personal p139

doi:10.1038/scientificamerican02271869-139c


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Articles

Improvement in Separating and Concentrating Ores, Grains, Etc. p129

doi:10.1038/scientificamerican02271869-129


“Modern Engineering”—By the Hon. Wm. J. Mcalpine p130

doi:10.1038/scientificamerican02271869-130


Is Hydrogen Gas a Metal? pp130 - 131

doi:10.1038/scientificamerican02271869-130a


Velocipede Notes p131

doi:10.1038/scientificamerican02271869-131


Editorial Summary p131

doi:10.1038/scientificamerican02271869-131a


Webb's Patent Adder and Tally Board p132

doi:10.1038/scientificamerican02271869-132


Greene's Portable Engine, Union Check Valve, and Lubricator pp132 - 134

doi:10.1038/scientificamerican02271869-132a


“Waste” and “Economy” of Fuel pp134 - 135

doi:10.1038/scientificamerican02271869-134a


Examination of Applications for Patents—The Two Systems Compared pp135 - 136

doi:10.1038/scientificamerican02271869-135


Land and Water—Are Earthquakes Land Makers? p137

doi:10.1038/scientificamerican02271869-137


Importance of Accuracy in the Use of Mechanical and Scientific Terms p137

doi:10.1038/scientificamerican02271869-137a


Hollow vs. Solid Shafting p137

doi:10.1038/scientificamerican02271869-137b


The Wickedness of Waste.—Value of Bones p137

doi:10.1038/scientificamerican02271869-137c


Vegetable Oils Used in Painting pp137 - 138

doi:10.1038/scientificamerican02271869-137d


Bulletin of the National Association of Wool Manufacturers p138

doi:10.1038/scientificamerican02271869-138


Conserving of Fruit pp138 - 139

doi:10.1038/scientificamerican02271869-138a


The Gard Brick Machine p139

doi:10.1038/scientificamerican02271869-139


Manufacturing, Mining, and Railroad Items p139

doi:10.1038/scientificamerican02271869-139a


New Publications p139

doi:10.1038/scientificamerican02271869-139b


Recent American and Foreign Patents pp139 - 140

doi:10.1038/scientificamerican02271869-139d


Answers to Correspondents p140

doi:10.1038/scientificamerican02271869-140


Official List of Patents pp140 - 142

doi:10.1038/scientificamerican02271869-140a


Patent Offices p142

doi:10.1038/scientificamerican02271869-142


European Patents p142

doi:10.1038/scientificamerican02271869-142a


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