. Machinery and processes of the industrial arts, and apparatus of the exact sciences. en to eighteenturns in a second. For reasons which Avill be apparent from the fore-going description, it does not furnish high intensity or produce longsparks 5 but the quantity it will generate in a given time is quiteremarkable. With two disks mounted as above described, and of thediameters of ten and fifteen inches respectively, a Ley den jar exposingone hundred and sixty square inches of coated surface is charged inless than half a second. HOLTZS ELECTROSTATIC INDUCTION MACHINE. The machine of Holtz init
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. en to eighteenturns in a second. For reasons which Avill be apparent from the fore-going description, it does not furnish high intensity or produce longsparks 5 but the quantity it will generate in a given time is quiteremarkable. With two disks mounted as above described, and of thediameters of ten and fifteen inches respectively, a Ley den jar exposingone hundred and sixty square inches of coated surface is charged inless than half a second. HOLTZS ELECTROSTATIC INDUCTION MACHINE. The machine of Holtz inits original form is shown inthe accompanying figure. Itsprincipal parts are, first, athick circular plate of glass,secured by four horizontalsupports vv v ?v1 forming partof a frame 5 second, a verythin and rotating disk ofglass, fixed to an axis, whichpasses through the thick plateby an aperture sufficientlylarge, and is driven by a pul-ley and multiplying-wheel op-erated by the handle M ; thethin disk is on the side of thethick plate most distant fromthe handle, and from the ob-. Holtzs Electrostatic Induction Machine. 552 PARIS UNIVERSAL EXPOSITION. server in this perspective view, but is very near it; third, two sets ofpoints, or electrical combs, in insulating supports, and with bindingscrews for the attachment of conducting wires C and C ; fourth, twoopenings or sectoral cuts, in the circumference of the fixed plate at Fand F7, of each of which one of the straight sides in the radial directionis armed with a coating of paper furnished with points also of paperor card-board, placed parallel to the rotating disk, but having a direc-tion opposite to that of the rotation. In order to bring on electrical action by means of this machine, oneof the paper armatures is charged with electricity by exciting a plate ofglass, a stick of sealing wax, or a piece of ebonite, by friction, andbringing the excited body into contact with the armature. On turningthe machine, electricity accumu
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectscientificappa
