But any magnet may be viewed either as one whole, or be conceived as composed of a succession of shorter magnets placed end to end. If we view it as one entire magnet, we call the end in which the magnetic essence is in greatest quantity the _positive_ end, and the end where it is in least quantity the _negative_ end. But if we imagine the one whole magnet as being divided up into several sections, then we conceive of each section as a distinct magnet, having its own positive and negative poles. And, all the way through, these sectional magnets will be arranged with the positive pole of the one joined to the negative pole of the next in advance of it. It is just so in respect to the magnetic circuit of a moving current. The whole circuit, as before remarked, is in reality one long magnet. But in applying the terms _positive_ and _negative_ in our practice we often view the whole circuit--the one long magnet--as composed of a series of shorter ones, arranged with positive and negative ends in contact; and all the way the current in each section is supposed to be running from the positive pole of the magnet behind to the negative pole of the magnet before. We consider the circuit, from the positive post around to the negative post, as composed of three magnets, as follows: Magnet No. 1, which extends from the positive post, along the cord and electrode, to the body of the patient, where the positive electrode is placed. The _negative pole_ of this magnet is the _wire end of the cord_ placed in the positive post, and its _positive_ pole in the _positive electrode_ placed upon the person of the patient. No. 2, which is composed of the parts of the patient traversed by the current between the two electrodes. Its negative end or pole is the part in contact with the positive pole of magnet No. 1, and its positive pole is the part in contact with the negative pole of magnet No. 3. No. 3 extends from the positive pole of No. 2, through the electrode and along the cord, to the negative post. Its negative pole is the _negative electrode_ in contact with the positive end or pole of magnet No. 2, and its positive pole is the _wire end of the cord_ in the negative post.