OF FERRUGINOUS BODIES. 249 
88. The experiments last detailed in this sec- 
tion, (80-83), appear to me to be well calculated 
to give a clue to the cause of the anomalies which 
Mr. Barlow met with; and, although the idea of 
the bar’s “cooling faster at its extremities than 
at its centre,” did not appear to be a satisfactory 
explanation to that philosopher; there appears 
to be a strong probability, at least, that that cir- 
cumstance was the sole cause; for, by such a 
cooling process, the bar would be converted into 
two distinct magnets, as in experiment 9, (82) ; 
in which condition it would operate on the needle 
in correspondence with the apparent anomalies 
in question, which would thus be traced to the 
well established laws of magnetic action. 
89. Having now placed before this society the 
experimental results I have arrived at, and the views 
I have taken in explanation of the phenomena, it 
only remains that I acknowledge the very hand- 
some manner in which my inquires have been 
facilitated through the kindness of Mr. Roberts ; 
and the able -assistance I received from Mr. 
Fothergill, in carrying on the experiments. ‘ 
