Volume 17, Issue 430supp
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Features
Recent Botanical Investigations
The Dodder
Electric Launches
The First Experiments with the Electric Light
Electrical Grapnel for Submarine Cables and Torpedo Lines
How to Harden Cast Iron
Hughes' New Magnetic Balance
Terrestrial Magnetism
Apparatus for Measuring Small Resistances
The Iron Industry in Brazil
(Province of minas geraes)