Prof. Faraday on some Points of Magnetic Philosophy. 97 



free space, its force is sensible -pis. 5^ 



around to a certain amount (114.) ; 



when a piece of soft iron, I, is 



brought near it, much of its force 



gathers up upon that iron, but the 



whole amount of force from and 



-%■ 



about the N pole is the same ; when — ///7/\ x 



an S pole is brought up, either of another magnet or of itself (for 

 the effect is precisely the same), much of the force exerted upon 

 the iron is removed from it, and falls upon the S pole, but the 

 amount of force about the pole N remains the same ; all of which 

 can be proved experimentally by a helix on the soft iron and loops 

 carried over the N pole (3218. 3223.). Indeed the way in which 

 the power of one pole over either iron or bismuth is affected 

 and diminished by the approximation on the same side of a 

 contrary pole, is perfectly well known, and there are hundreds 

 of cases in which the disposition in direction of the magnetic 

 power can be varied in a great variety of ways, without the 

 slightest change in the sum of its amount at the source, each of 

 which gives evidence of the antithetical and inseparable con- 

 dition of the two forms of force. 



3329. As to independent existence of the two powers 

 (3327.), how is it then that they cannot be shown separately ? 

 — not even up to the degree which is exhibited, so to say, by 

 static electricity. There is nothing like a charge of northness 

 or a charge of southness in any one of the innumerable pheno- 

 mena presented by magnetism (3341.). The two are just as 

 closely connected as the two electricities of a voltaic battery ; 

 whether we consider it as giving the current when properly con- 

 nected, or exhibiting induction at its extremities when uncon- 

 nected. The difficulty, indeed, is to find a fact which gives one 

 the least hold for consideration of the thought that the two 

 magnetic forces can be separated, or considered apart from each 

 other. 



3330. As to the suppression of force (3327.), I conceive that 

 the creation, annihilation, or suppression of force, and still more 

 emphatically of one form only of a dual force, is as impossible 

 as the like of matter. All that is permitted under the general 

 laws of nature is to displace, remove, and otherwise employ it ; 

 and these conditions are as true of the smallest suppression of a 

 force, or part of a force, as of the suppression of the whole. I 

 may further ask, whether, as it is physically impossible to anni- 

 hilate or suppress force, it is not also mathematically impossible 

 to do so, consistently with the law of the conservation of force ? 



3331. If we say that the forces in the cases of removal 

 (3327.) are disposed of, sometimes in one direction and some- 



Phil. Mag. S. 4. Vol. 9. No. 57. Feb. 1855. H 



