Oscillations and Waves > Waves > Longitudinal Waves | DCS# 3B20.70 |
Crova's disk | 202-17-E2 |
overhead projector | 201 |
We also have a larger motor-driven version: 202-06-A
Some history:
http://physics.kenyon.edu/EarlyApparatus/Rudolf_Koenig_Apparatus/Crovas_Disks/Crovas_Disks.html