Wave-Demonstration-Machine-Set-Kit-Cochranes-Of-Oxford-0126-P-The-Cochrane-s-Wave-Machine-Set-Kit-nbsp-provides-an-inexpensive-way-to-demonstrate-the-theory-of-waves-Apart-from-the-slinky-spring-the-pieces-are-supplied-in-kit-form-for-the-user-to-assemble-saving-vital-cash-P-P-Demonstrations-with-this-set-are-all-concerned-with-mechanical-vibrations-however-all-waves-mechanical-electromagnetic-water-etc-satisfy-the-same-wave-equation-&-consequently-have-common-wav