Hence, it is argued that the electric current is induced through the agency of the nervous system, and that, as human Will produces the muscular contraction requisite, so is it human Will that causes the deflection of the needle. I imagine that if this theory were substantiated by experiment, the discovery might lead to some sublime and unconjectured secrets of science. For human Will, thus actively effective on the electric current, and all matter, animate or inanimate, having more or less of electricity, a vast field became opened to conjecture. By what series of patient experimental deduction might not science arrive at the solution of problems which the Newtonian law of gravitation does not suffice to solve; and--But here I halt. At the date which my story has reached, my mind never lost itself long in the Cloudland of Guess.
I was dissatisfied with my experiment. The needle stirred, indeed, but erratically, and not in directions which, according to the theory, should correspond to my movement. I was about to dismiss the trial with some uncharitable contempt of the foreign philosopher's dogmas, when I heard a loud ring at my street-door. While I paused to conjecture whether my servant was yet up to attend to the door, and which of my patients was the most likely to summon me at so unseasonable an hour, a shadow darkened my window. I looked up, and to my astonishment beheld the brilliant face of Mr. Margrave. The sash to the door was already partially opened; he raised it higher, and walked into the room. "Was it you who rang at the street-door, and at this hour?" said I.
"Yes; and observing, after I had rung, that all the shutters were still closed, I felt ashamed of my own rash action, and made off rather than brave the reproachful face of some injured housemaid, robbed of her morning dreams. I turned down that pretty lane,--lured by the green of the chestnut-trees,--caught sight of you through the window, took courage, and here I am! You forgive me?" While thus speaking, he continued to move along the littered floor of the dingy room, with the undulating restlessness of some wild animal in the confines of its den, and he now went on, in short fragmentary sentences, very slightly linked together, but smoothed, as it were, into harmony by a voice musical and fresh as a sky lark's warble. "Morning dreams, indeed! dreams that waste the life of such a morning. Rosy magnificence of a summer dawn! Do you not pity the fool who prefers to lie a bed, and to dream rather than to live? What! and you, strong man, with those noble limbs, in this den! Do you not long for a rush through the green of the fields, a bath in the blue of the river?"
Here he came to a pause, standing, still in the gray light of the growing day, with eyes whose joyous lustre forestalled the sun's, and lips which seemed to laugh even in repose.
But presently those eyes, as quick as they were bright, glanced over the walls, the floor, the shelves, the phials, the mechanical inventions, and then rested full on my cylinder fixed to the table. He approached, examined it curiously, asked what it was. I explained. To gratify him I sat down and renewed my experiment, with equally ill success. The needle, which should have moved from west to south, describing an angle of from thirty degrees to forty or even fifty degrees, only made a few troubled, undecided oscillations.
"Tut," cried the young man, "I see what it is; you have a wound in your right hand."
That was true; I had burned my band a few days before in a chemical experiment, and the sore had not healed.
"Well," said I, "and what does that matter?"
"Everything; the least scratch in the skin of the hand produces chemical actions on the electric current, independently of your will. Let me try."
He took my place, and in a moment the needle in the galvanometer responded to his grasp on the cylinder, exactly as the inventive philosopher had stated to be the due result of the experiment.
I was startled.
"But how came you, Mr. Margrave, to be so well acquainted with a scientific process little known, and but recently discovered?"
"I well acquainted! not so. But I am fond of all experiments that relate to animal life. Electricity, especially, is full of interest."
On that I drew him out (as I thought), and he talked volubly. I was amazed to find this young man, in whose brain I had conceived thought kept one careless holiday, was evidently familiar with the physical sciences, and especially with chemistry, which was my own study by predilection. But never had I met with a student in whom a knowledge so extensive was mixed up with notions so obsolete or so crotchety. In one sentence he showed that he had mastered some late discovery by Faraday or Liebig; in the next sentence he was talking the wild fallacies of Cardan or Van Helmont. I burst out laughing at some paradox about sympathetic powders, which he enounced as if it were a recognized truth.
"Pray tell me," said I, "who was your master in physics; for a cleverer pupil never had a more crack-brained teacher."
"No," he answered, with his merry laugh, "it is not the teacher's fault. I am a mere parrot; just cry out a few scraps of learning picked up here and there.