Srientific American. FEBRUARY 12, 1887.] 105 ‘SCIENCE IN TOYS. … from the poles of the magnet may be exhibited by the tric generators, old and well. known experiment, consisting in sprink- The ver- ling iron filings over a-glass plate laid over the poles ot tical spindle the magnet, as which car- shown in the en- ries the graying. armature is These curves…
Internet Archive · Public domain (published before 1931). Free to use for anything.
