At 10:30 pm 1/12/99 +0000, Peter L. Peres wrote: >Hello, > > I know that this method seems funny (and Alice needled me) so I'm >looking at the various problems: Turns out that no-one ever heard of pipe >organs de-tuning themselves, that the resonant frequency is linearly >proportional with the column height (strictly linearly) No, it is the resonant wavelength that is directly proportional to length (does the frquency get bigger or smaller when the length gets bigger?). The relationship between wavelength and frequency does IIRC depend on atmospheric pressure. regards, Mike