If, in the examination of the spine, the practitioner finds it uncomfortable to bear in his fingers a current of sufficient strength to be distinctly felt in that part of the patient, he may use the side-sponge cup on the spine. But let him _never use a current on another person_ which he does not first apply to his own nerves, so as to know its intensity. Indeed, if one prefer to use the side-sponge cup through the whole process, he can do so; although there is advantage in using the fingers, since, by their concentrated impressions, he is more sure to detect disease than by the broader face of the sponge cup. ☞Now, wherever there is found _soreness_ or _lancinating pain_ under the touch, it is sure that the part is preternaturally _positive_--more or less so, according to the degree of painful irritability. On the other hand, if there be found a part evincing much _less_ than the usual sensibility found in the _healthy_ corresponding part of other patients, it may safely be pronounced torpid or paralytic, more or less. It lacks sufficient electro-vitality--is improperly _negative_, and needs to be treated with the negative pole. It will often happen that diseased action is found in parts where the patient was entirely unaware of its existence until the practitioner's fingers or other electrode revealed it. Again, it will sometimes be found that there is no disease whatever in parts where the patient supposed disease to be active. But when we find patients to be especially nervous, it is not always best to tell them immediately just what our examinations have revealed to us--how severely or how little we think them diseased. It is sometimes better to humor, more or less, the patient's own views for a time; lest, by exciting him or her, we make a difficult case out of one that might have been mastered with comparative ease. In this matter discretion should guide us. But let me say farther, what I deeply feel, that neither do I think it right to _persistently_ conceal from patients, especially those who are dangerously affected, a knowledge of their true condition. In my opinion, physicians often unwittingly incur an awful responsibility in this way, wronging their patients in the most vital and momentous of all interests--the interests involved in a due preparation for death. I believe the true way, in every such case, is for the physician himself, in a kind and soothing manner, to reveal to the patient, little by little, if need be, what he really thinks, or to ask the patient's pastor, or some other calm and judicious person to do it for him. I believe the visits of a discreet and affectionate pastor, or, in the absence of a pastor, of some other mild and Christian friend, to the bedside of the sick is, nine times in ten, not only no embarrassment to the patient's recovery, but positively favorable to it, and ought to be habitually encouraged, rather than restrained, by medical practitioners. PRESCRIPTIONS. PRELIMINARY REMARKS.