| Exp
1 Two batteries
arranged as one. The coil with 60 feet copper
ribbon
inch & ½ wide gave greatest snap.5 When hands were placed to
connect
the
extremities
 of coil no shock. When iron vice was brough[t] to the side of the
copper
of the
 battery & connected with the end of the coil brilliant
scintilations
 Exp
2 The current passed
through a galvanic magnet no increased effect
perceived in the spark--current passed in the opposite direction no increased
effect.
 Exp 3 Passed the current
through the large magnet and afterwards around
it so as to magnetize the iron at the <same> instant of making the
contact or
demagnetize
it at the instant  of breaking the circuit. Small spark.
Experiment not satisfactory must
be tried again7
 Henry
Papers, Smithsonian
Archives. Published in Nathan Reingold et
al.,
eds. The Papers of Joseph Henry, vol. 2, November 1832-December 1835:
The Princeton Years
(Washington, 1975), p. 392. |