Table of contents


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Departments

Correspondence

Correspondence p69

doi:10.1038/scientificamerican01281865-69a


Patent Notes

Patents pp74 - 75

doi:10.1038/scientificamerican01281865-74


Notes and Queries

Notes and Queries pp75 - 78

doi:10.1038/scientificamerican01281865-75


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Articles

Mechanical Hand Rake p63

doi:10.1038/scientificamerican01281865-63


Tool for Drawing Broken Pump Rods p63

doi:10.1038/scientificamerican01281865-63a


How to Shrink Collars on a Shaft p63

doi:10.1038/scientificamerican01281865-63b


Polytechnic Association of the American Institute p64

doi:10.1038/scientificamerican01281865-64


Some Facts about Peru p64

doi:10.1038/scientificamerican01281865-64a


The Law of Successive Species pp64 - 66

doi:10.1038/scientificamerican01281865-64b


The Metric System p66

doi:10.1038/scientificamerican01281865-66


Turning Tools p67

doi:10.1038/scientificamerican01281865-67


Editorial Correspondence pp68 - 69

doi:10.1038/scientificamerican01281865-68


Professor Page the Inventor of the Ruhmkorff Coil p69

doi:10.1038/scientificamerican01281865-69


Hardening and Tempering Steel p69

doi:10.1038/scientificamerican01281865-69b


Guns Bursting in Action pp69 - 70

doi:10.1038/scientificamerican01281865-69c


The Size of Holes in Furnace Doors p71

doi:10.1038/scientificamerican01281865-71


Dispatch from Assistant Secretary Fox p71

doi:10.1038/scientificamerican01281865-71a


A Sensible New Year's Gift p71

doi:10.1038/scientificamerican01281865-71b


A Gas Explosion p71

doi:10.1038/scientificamerican01281865-71c


Adulterating Lard with Water p71

doi:10.1038/scientificamerican01281865-71d


Beam Engines pp71 - 72

doi:10.1038/scientificamerican01281865-71e


Professor Grove on Light p72

doi:10.1038/scientificamerican01281865-72


Paper from Cane p72

doi:10.1038/scientificamerican01281865-72a


Special Notice p72

doi:10.1038/scientificamerican01281865-72b


Recent American Patent pp73 - 74

doi:10.1038/scientificamerican01281865-73


Patent Claims pp73 - 74

doi:10.1038/scientificamerican01281865-73a


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