An international system of electro-therapeutics : for students, general practitioners, and specialists . zing the peculiarity of the current which I had discovered, andwhich had led me to utilize its therapeutic properties for a number of METHODS OF APOSTOLI AND OTHERS. G-79 years, and with excellent advantage, I was quite at a loss to understandits peculiar qualities. I showed the machine to Dr. E. Betton Massey,of Philadelphia, and other medical electricians, who, like myself, werestruck with its peculiar properties, but were unable to explain the reasonof its peculiarities. In order to obta
An international system of electro-therapeutics : for students, general practitioners, and specialists . zing the peculiarity of the current which I had discovered, andwhich had led me to utilize its therapeutic properties for a number of METHODS OF APOSTOLI AND OTHERS. G-79 years, and with excellent advantage, I was quite at a loss to understandits peculiar qualities. I showed the machine to Dr. E. Betton Massey,of Philadelphia, and other medical electricians, who, like myself, werestruck with its peculiar properties, but were unable to explain the reasonof its peculiarities. In order to obtain a tracing of the current, I improvised an electro-graph by attaching a writing lever to the solenoid of a large and verydelicate galvanometer. The curve which I obtained by this means en-couraged me to persevere. I accordingly undertook to make a moredelicate machine, the construction of v/hich, although different from thatof dArsonvals, was suggested to me by the description of his construction is as follows :— A, B, C, and D, Fig. 2, represent the several portions of a soft-iron. Fig. 2.—Section of the Electrograph. frame. On the two arms, D and U, are mounted two solenoids, E E,each wound with 106 feet of copper wire of the diameter two solenoids are connected with the poles of a battery, thus pro-ducing an electro-magnet, of which A constitutes one pole, and B B aresemicircular at their ends, so as almost completely to embrace the armJ, thus producing an annular magnetic field. A small solenoid com-posed of feet of very fine copper wire ( inch in diameter) isplaced at F. The current to be tested is passed through this solenoidby making proper connections with the terminals, L L. When a current is passing through the coils E E, thus producinga magnetic field about the solenoid F, a current flowing in one directionthrough F will cause it to be lifted up, while a current passing in theopposite direction will cause it to drop below
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
