An Interesting Case of Resonance

A CURIOUS example of resonance is to be noticed in Llandingat Church, Llandovery, South Whales. In one of the windows there is a pane of glass which is not very tightly fixed, being free to oscillate with a definite frequency, which happens to correspond to the frequency of the low pedal “G” of the organ. The consequence is that when the service is taken in G, at the end of each of the Responses, Amens, c and I have seen strangers sitting near the window seem quite perplexed, not knowing what causes the noise.