Table of contents

Do Alkalies Injure the Teeth? - p3

doi:10.1038/scientificamerican09121857-3a

Saw Gummers - p3

doi:10.1038/scientificamerican09121857-3b

Patent Extensions—Mismanagement in the Notices - p3

doi:10.1038/scientificamerican09121857-3c

Apparatus for Navigating the Air - p3

doi:10.1038/scientificamerican09121857-3d

Drying Sized Paper - p3

doi:10.1038/scientificamerican09121857-3e

Artificial Marble - p3

doi:10.1038/scientificamerican09121857-3f

Patent Sleigh—Collecting Agents - p4

doi:10.1038/scientificamerican09121857-4

Improved Reaper and Mower - p4

doi:10.1038/scientificamerican09121857-4a

Willson's Sawing Machine - p4

doi:10.1038/scientificamerican09121857-4b

Fire-Place Shutters - p4

doi:10.1038/scientificamerican09121857-4c

Birthday of the Scientific American - p5

doi:10.1038/scientificamerican09121857-5

Contradictions and Curiosities in Science - p5

doi:10.1038/scientificamerican09121857-5a

The Commissioner of Patents and the Patent Office - p5

doi:10.1038/scientificamerican09121857-5b

A Profitable Enterprise - p5

doi:10.1038/scientificamerican09121857-5c

Our New Dress - p5

doi:10.1038/scientificamerican09121857-5d

Feats of Fire-Arms - p6

doi:10.1038/scientificamerican09121857-6

Ludwig's Machine for Felling Trees - p6

doi:10.1038/scientificamerican09121857-6a

Steam Cultivation in England - p6

doi:10.1038/scientificamerican09121857-6b

A Trap Vender and his Wares - p6

doi:10.1038/scientificamerican09121857-6c

Correspondents - p7

doi:10.1038/scientificamerican09121857-7

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The Late Commissioner of Patents - p8

doi:10.1038/scientificamerican09121857-8

The Inventor of the Safety Lamp - p8

doi:10.1038/scientificamerican09121857-8a

Death of an Eminent Physician - p8

doi:10.1038/scientificamerican09121857-8b

New Prospectus - p8

doi:10.1038/scientificamerican09121857-8c