ate cemented to the center of the glass. posite edge of the baseboard is connected with the pivot When a conductor is laid across the compass, parallel of the switch arm, E. with the needle, and a current is sent through the con- The contact springs are designed to make connections ductor, the… … and just prior to closing it. The door is made princi- Another curious discovery, due to the same great the discovery of Oersted, pally of steel and iron plates bolted together and rab- Sch weigger found that the power of the current over the physicist, is that of the mutual attraction and…
Center · Munn · Patents · Apparatus · Scientific American · Illustrated · Young man · Water Supply · Plug tobacco · Miles north · Professor house · Fine wire · Tobacco manufactured · Vault door · Van depoele
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