402 Dr. Faraday's Researches in Electricity. [Series xx. 



2267. So the indicating particle would move, either along 

 the magnetic curves, or across them ; and it would do this 

 either in one direction or the other; the only constant point 

 being, that its tendency was to move from stronger to weaker 

 places of magnetic force. 



2268. This appeared much more simply in the case of a 

 single magnetic pole, for then the tendency of the indicating 

 cube or sphere was to move outwards, in the direction of the 

 magnetic lines of force. The appearance was remarkably 

 like a case of weak electric repulsion. 



2269. The cause of the pointing of the bar, or any oblong- 

 arrangement of the heavy glass, is now evident. It is merely 

 a result of the tendency of the particles to move outwards, or 

 into the positions of weakest magnetic action. The joint ex- 

 ertion of the action of all the particles brings the mass into 

 the position, which, by experiment, is found to belong to it. 



2270. When one or two magnetic poles are active at once, 

 the courses described by particles of heavy glass free to move, 

 form a set of lines or curves, which I may have occasion here- 

 after to refer to ; and as I have called air, glass, water, &c. 

 diamagnetics (2149.), so I will distinguish these lines by the 

 term diamagnetic curves, both in relation to, and contradi- 

 stinction from, the lines called magnetic curves. 



2271. When the bar of heavy glass is immersed in water, 

 alcohol, or aether, contained in a vessel between the poles, all 

 the preceding effects occur; the bar points and the cube re- 

 cedes exactly in the same manner as in air. 



2272. The effects equally occur in vessels of wood, stone, 

 earth, copper, lead, silver, or any of those substances which 

 belong to the diamagnetic class (2149.). 



i 2273. I have obtained the same equatorial direction and 

 motions of the heavy glass bar as those just described, but in 

 a very feeble degree, by the use of a good common steel horse- 

 shoe magnet (2157.). I have not obtained them by the use 

 of the helices (2191. 2192.) without the iron cores. 



2274. Here therefore we have magnetic repulsion without 

 polarity, i. e. without reference to a particular pole of the 

 magnet, for either pole will repel the substance, and both 

 poles will repel it at once (2262.). The heavy glass, though 

 subject to magnetic action, cannot be considered as magnetic, 

 in the usual acceptation of that term, or as iron, nickel, cobalt, 

 and their compounds. It presents to us, under these circum- 

 stances, a magnetic property new to our knowledge; and 

 though the phaenomena are very different in their nature and 

 character to those presented by the action of the heavy glass 

 on light (2152.), still they appear to be dependent on, or con- 



