File talk:Musical instrument classification by physics-based organology.png
The image breaking down the five categories of musical instruments is erroneous and should be revised. It should at a minimum remove the category of quintessence (which should not be spelled quintessance) and should emphasize that only the bulk vibrational medium is being changed. Also, the plasma entry should indicate that it is in fact most nearly a special case of the gas phase, where the medium can be described by "shape matches container" and "fills volume of container", with the additional description of "Interacting particles". For clarity, the gas phase could be approximately described as "non-interacting particles" in order to distinguish clearly from the plasma state.
