Antarctic Exploration - pp50 - 51

doi:10.1038/scientificamerican01231897-50

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A New Electric Current Regulator - p52

doi:10.1038/scientificamerican01231897-52

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A Convenient Household Refrigerator - p52

doi:10.1038/scientificamerican01231897-52a

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Recent Irrigation Work on the Navaho Reservation - pp52 - 55

Cosmos Mindeleff

doi:10.1038/scientificamerican01231897-52b

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A Theater with two Auditoriums - p55

doi:10.1038/scientificamerican01231897-55

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Some Pacific Caves - p56

C. F. Holder

doi:10.1038/scientificamerican01231897-56

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The Walhalla of Ratisbon - pp57 - 58

doi:10.1038/scientificamerican01231897-57

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A Novel Method of Propelling Vessels - p58

doi:10.1038/scientificamerican01231897-58

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A Folding Malay Kite - p59

doi:10.1038/scientificamerican01231897-59

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Logging Locomotive for Wooden Track - pp59 - 60

doi:10.1038/scientificamerican01231897-59a

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To Inventors - p61

doi:10.1038/scientificamerican01231897-61c

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