124 
reputed to be pure) — continued to take the axial position 
when the polar pieces were approached to 0.29, but its 
motions then became very sluggish; and at 0.15, after 
being first attracted, took a decidedly equatorial position. 
Tin — (this was deposited, electrolitically, from a solution 
of protochloride) — continued to tend towards the axial posi- 
tion, or to be attracted till the polar pieces were approached 
to within 0.15; the motions were then very sluggish, but 
exhibited signs of being attracted on breaking circuit. 
Silver and Copper continued to be attracted, the polar 
pieces being at 0.15. The silver was prepared by reducing 
precipitated chloride of silver by carbonate of potash, in 
a small crucible of pipe clay. The copper was deposited 
from sulphate of copper by the electrotype process. 
The polar pieces being closed to within 0.1, the zinc and 
gold were yet attracted at the first completion of the voltaic 
circuit, but afterwards appeared as though floating between 
the two surfaces : but lead at once took the equatorial posi- 
tion, without experiencing any attraction. Tin and cadmium 
were also repelled after the first contact. Copper and silver 
continued to be attracted. 
The experiments with the polar pieces so close as 0.1, 
are not altogether to be relied on, as regards the revulsive 
movements, for the lateral motions hereafter mentioned took 
place so decidely as to render the other movements very 
difficult of observation. 
One of the polar pieces being altogether removed, and 
the discs being hung at a distance of about a millimetre 
from the other polar piece, and the arrangement main- 
tained as before in other respects, platina was attracted, 
and no revulsion exhibited. Palladium was very slightly 
repelled on completing the circuit, and then attracted ; but 
on breaking the circuit was revulsively repelled, though 
so slightly that the motion was only just perceptible. 
