Lectures on nervous diseases from the standpoint of cerebral and spinal localization, and the later methods employed in the diagnosis and treatment of these affections . Fig. 172.—The Stationary Plate op the Origi-nal HOLTZ, SHOWING ITS AuMATURES AND Windows, with the Projections upon theArmatures. 654 LECTURES ON NERVOUS DISEASES. In the original Iloltz machine, a charge was primarily effected byrultbino- a piece of ebonite briskly witli cat-skin nntil it became highlycharged witii negative electricity, and then api)lying it closely to one ofthe paper collectors on the stationary plate of the
Lectures on nervous diseases from the standpoint of cerebral and spinal localization, and the later methods employed in the diagnosis and treatment of these affections . Fig. 172.—The Stationary Plate op the Origi-nal HOLTZ, SHOWING ITS AuMATURES AND Windows, with the Projections upon theArmatures. 654 LECTURES ON NERVOUS DISEASES. In the original Iloltz machine, a charge was primarily effected byrultbino- a piece of ebonite briskly witli cat-skin nntil it became highlycharged witii negative electricity, and then api)lying it closely to one ofthe paper collectors on the stationary plate of the machine. By the law of indnction the comb opposed to this paper collector becomeselectrically excited immediately. It at once deposits posiYtue electricififon the side of the revolving plate nearest to the comb, and takes nega-tive electricifif away from the revolving plate. Thns the revolving platebecomes podtively electrified to a very high degree at this Fig. 173.—Holtzs Static Induction Machine, with Horizontai. Plates.—The plateshave winjuws nor armatures, and they revolve in opposite directions. Now, when the wheel is made to revolve to that point where it meetsthe other paper collector upon the stationary plate, indnction againtakes place. Negative electricity is deposited (1) by the collector onthe opposite side of the revolving plate (the side nearest to the papercollector), and (2) by the metal comb; at the same time positive elec-tricity is taken from th^ adjacent side of the revolving plate by thecollector, and also by the metal comb, from the opposite side of therevolving plate. This interchange of electricities charges the positivepole of the machine. The revolving plate (now excessively charged with negative elef-tricity) goes on to the next paper collector. Here a similar exchange STATIC ELECTRICITY, 6o5 of electrical conditions occurs. Tlie negative electricity is taken frontthe revolving; plate b} both the
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Keywords: ., bookcentury1800, bookdecade1880, bookidlecturesonne, bookyear1888
