ACTION OF MAGNETS ON SOLUTIONS OF SULPHATE OF IRON. 
45 
magnetic forces upon the matter in the tubes could be examined and observed, both 
when the tubes were in diamagnetic media, as air, water, alcohol, &c., and also in 
magnetic media, either stronger or weaker in magnetic force than the substances in 
the tubes. 
2364. When these tubes were suspended in air between the poles, they all pointed 
axially or magnetically, as was to be expected ; and with forces apparently propor- 
tionate to the strengths of the solutions. When they were immersed in alcohol or 
water, they also pointed in the same direction ; the strongest solution very well, and 
also the second, but the weakest solution was feeble in its action though very distinct 
in its character (2422.). 
2365. When the tubes, immersed in the different ferruginous solutions, were acted 
upon, the results were very interesting. The tube No. 1 (the strongest magnetically), 
when in solution No. 1, had no tendency, under the influence of the magnetic 
power, to any particular position, but remained wherever it was placed. Being placed 
in solution No. 2, it pointed well axially, and in solution No. 3 it took the same 
direction, but with still more power. 
2366. The tube No. 2, when in the solution No. 1, pointed equatorially, i. e. as heavy 
glass, bismuth, or a diamagnetic body generally, in air. In solution No. 2 it was in- 
different, not pointing either way; and in solution No. 3 it pointed axially, or as a 
magnetic body. The tube No. 3 containing the weakest solution, pointed equatorially 
in solutions No. 1 and 2, and not at all in solution No. 3. 
2367- Several other ferruginous solutions varying in strength were prepared, and, 
as a general and constant result, it was found that any tube pointed axially if the so- 
lution in it was stronger than the surrounding solution, and equatorially if the tube 
solution was the weaker of the two. 
2368. The tubes were now suspended vertically, so that being in the different so- 
lutions they could be brought near to one of the magnetic poles, and employed in 
place of the indicating cube or sphere of bismuth, or heavy glass (2266.). The con- 
stant result was, that when the tube contained a stronger solution than that which 
surrounded it, it was attracted to the pole, but when its solution was the weaker of 
the two it was repelled. The latter phenomena were as to appearance in every respect 
the same as those presented in the repulsion of heavy glass, bismuth, or any other 
diamagnetic body in air. 
2369. Having described these phenomena, I will defer their further consideration 
until I arrive at the last division of this paper, and proceed to certain results more 
especially belonging to the present part of these Researches. 
23/0. As the magnetic metals, iron, nickel and cobalt, present in their compounds 
substances also distinguished by the possession of magnetic properties (2360.), so it 
appeared very probable that other metals, of whose magnetic character doubts were 
entertained, because of the possible presence of iron in the specimens experimented 
with, might in this way have their magnetic character tested ; for it seemed likely, 
from analogy, that every metal well magnetic per se, would be magnetic in its com- 
