. Contributions to practical physiology and pharmacology. Physiology; Pharmacology. RhE0C(ikii and Ukiiick 39 The contact bars arc str()ii<;Iy mounted and insulated. Contact is controlled hy a screw haviufj a lar<j^e calibrated head. The key may Ijc instantly adjusted for single shocks or two shocks separated by varying intervals. The interval between the shocks may be made very slight. Figs. 33 and 34 are tracings obtained with this Fig 3.^. This tracing (summation of stimuli) indicates the accuracy of the key and con- stancy of the drum speed as five tracings were superposed with
. Contributions to practical physiology and pharmacology. Physiology; Pharmacology. RhE0C(ikii and Ukiiick 39 The contact bars arc str()ii<;Iy mounted and insulated. Contact is controlled hy a screw haviufj a lar<j^e calibrated head. The key may Ijc instantly adjusted for single shocks or two shocks separated by varying intervals. The interval between the shocks may be made very slight. Figs. 33 and 34 are tracings obtained with this Fig 3.^. This tracing (summation of stimuli) indicates the accuracy of the key and con- stancy of the drum speed as five tracings were superposed with both one and two stimuli. COMBINKD RhKOCORD AND BrIDGE Form I The instrument is of compact form, Fig. 35. The base is square and measures 90 x 90 mm. The total height is about 90 mm. It is of rotating type. The resistance is Mangan wire. It is wrapped in spiral grooves turned in a hard rubber hollow core. There are 30 turns of wire. The total resistance is 6 ohms. The lower end of the wire is attached to a binding post, which is designated zero. The upper end is carried to the base through a thick copper connection and connects with a post designated 100. The sliding contact is of spring brass and is attached to the inside of the cap, Fig. 36. The cap rotates upon a threaded rod which is solidly attached in the center of the inside of the top. The threads of the rod engage with the threads of a brass socket attached to the upper end of the rubber core. The thread of the rod and socket is of the same dimension as the thread of the rubber core into which the resistance wire is wound. Therefore, when the cap is rotated the slider very accurately follows the resistance wire. A thick brass connection unites the threaded socket with a post on the base designated S. The upper rim of the cap is milled to facilitate rotation. Around the lower margin the cap is calibrated in 20 equal. Please note that these images are extracted from scanned page images that may have been digitally enhan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
