242 PECULIARITIES IN THE MAGNETISM 
76. When the bars had become quite cold, 
and after they had lain for a considerable time 
horizontally on the floor, they were severally held 
by the hand in the line of the dip; and whilst in 
that position agitated by blows from a wooden 
mallet. This operation being performed on an 
individual bar, it was afterwards placed in the 
same position as it was whilst hot, in the previous 
experiments, (54—62); the needle being east, 
at the distance of six inches, as before. When 
the magnetic action of the upper end A, of the 
bar had been indicated by the needle’s deflection, 
it was inverted ; and the action of the now upper 
end B, ascertained in like manner. 
77. The following are the results of the ex- 
periments in which the bars were agitated by a 
series of blows with a wooden mallet, whilst held 
loosely with their axis in the line of the magnetic 
dip. The magnetic action of the upper ends of 
the bars, was alone ascertained. 
EXPERIMENT 6. 
Iron Bar, Cold 
No. 2, Solid { 
& unagitated 
End A, deflection 26°{ mean 
End B, ay 252) Dame 
