Henry, Joseph, 1797-1878 · Philadelphia, Printed by James Kay, Jun. & Brother · leaf 23
31 ON ELECTRO-DYNAMIC INDUCTION. 57. To test this the compound helix was placed about five inches Fig. 5. … a represents coil No. 1 , b helix No. 1, and c an interposed plate of metal. account of its temporary magnetism; but this idea was shown to be erroneous by substituting a plate of zinc of about the same size and thickness, With this the screening influence was exhibited as before. 59. After this a…
Electromagnetic induction · Electromagnetism · Electric currents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
