Improved Variable automatic Cut-off - pp31 - 32

doi:10.1038/scientificamerican07201878-31

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The uses of Mechanism - p32

doi:10.1038/scientificamerican07201878-32

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Working Gold Ores - pp32 - 33

doi:10.1038/scientificamerican07201878-32a

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The Sun - pp33 - 34

S. P. Langley

doi:10.1038/scientificamerican07201878-33

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Professor Edison's New Carbon Rheostat - p35

doi:10.1038/scientificamerican07201878-35

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The Chase Elemental Governor - pp35 - 37

doi:10.1038/scientificamerican07201878-35a

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Communications - p37

doi:10.1038/scientificamerican07201878-37

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Improved Piston Rod Stuffing Box - p38

doi:10.1038/scientificamerican07201878-38

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Improved Automatic Fan - p38

doi:10.1038/scientificamerican07201878-38a

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Improved Step Box - pp38 - 39

doi:10.1038/scientificamerican07201878-38b

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Wood Carver of Simla - pp39 - 40

doi:10.1038/scientificamerican07201878-39

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Astronomical Notes - p40

Berlin H. Wright

doi:10.1038/scientificamerican07201878-40

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The Phonograph - p40

doi:10.1038/scientificamerican07201878-40a

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Apparatus for Administering Medicine to Horses - p41

doi:10.1038/scientificamerican07201878-41

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A Boat Older Than the Ark - pp41 - 42

doi:10.1038/scientificamerican07201878-41a

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The Otto Bicycle - p42

doi:10.1038/scientificamerican07201878-42

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A Simple Gas Generator - p42

doi:10.1038/scientificamerican07201878-42a

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