Sound / by John Tyndall.

  • Tyndall, John, 1820-1893.
Date:
1883
Catalogue details

Licence: Public Domain Mark

Credit: Sound / by John Tyndall. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

    123/494 (page 101)
    DIVISION ,OF MUSICAL STRINGS. half a little rider of red paper. Damping the centre and drawing the bow, the string shivers, and the rider is over- i thrown, fig. 41. When the string is damped at a point which cnts ott one-third of its length, and the bow drawn across the Fig. 41. shorter section, not only is this section thereby thrown into vibration, but the longer section divides itself into two ventral segments with a node between them. This is proved by placing small iriders of red paper on the ventral segments, and a rider of blue paper at the node. Passing the bow across the short segment you observe a fluttering of the red riders, and now they are completely tossed off, while the blue rider which crosses the node is undisturbed, fifc. 42.