208 PECULIARITIES IN THE MAGNETISM 
7. Professor Christie arrived at similar results 
by vibrating magnetic needles, alternately expo- 
sed to, and screened from, the sun’s rays.* 
8. Hence it has become an established fact, 
that a steel magnet, whether large or small, loses 
some portion of its power by an elevation of 
temperature, whether heated by the sun’s rays, 
or by other means. 
9. The experiments of Canton, however, have 
a still higher interest, by showing that the heat 
of boiling water not only produces a loss of power, 
but that a portion of that loss is permanent; so 
that the magnet never recovers its original power 
by the mere act of cooling to the original tem- 
perature. 
10. I have repeated Canton’s experiments, and 
have found the same results, and have discovered 
also, that the loss of power, both transient and 
permanent, varies considerably under certain cir- 
cumstances, and have met with other curious 
results, which will be made known to this society 
in another communication. 
* Philosophical Transactions. 
