218 PECULIARITIES IN THE MAGNETISM 
27. The apparatus employed in these experi- 
ments, consisted of magnetized masses of steel of 
various sizes and figures ;—a magnetic compass- 
needle, two inches long; andaspirit ye. 1. 
lamp. The needle, ns Fig. 1, is n 
first adjusted to the meridian line sp 
of the card; and when at rest, the 
north end of the magnetized steel 
N §, is placed on the north side of 
it, with its axis of polarization in the 
« 
plane of the magnetic meridian ; and 
so adjusted that the pole nearest to 
the compass keeps the, now inverted, 
needle also in the magnetic meri- 
dian. 
28. When this arrangement is completed, the 
flame of the spirit lamp is applied to one side of 
the magnetized steel plate, N S, as at /in the 
figure. The needle soon removes from the me- 
ridian line, indicating a corresponding movement 
of the adjacent magnetic pole of the plate ; which 
will be towards the point of heat, or from it, 
accordingly with the following circumstances. 
29. If the magnetized steel plate be thin, say 
about the thickness of the blade of a small hand- 
