It is well known that the vibrations of a violin are produced by those of the string, transmitted through the bridge, but that what we hear comes mainly from the top and back of the body, and from the enclosed air mass through the f‐holes. The resonant pitches of the body and of the air column are examined by a method due to Raman. With an automatic player which produces a steady tone the least weight needed to make the instrument “speak” properly has been measured at each frequency. A curve of these weights drawn against the frequency discloses the resonant frequencies. A simple method is described whereby the main air‐mass frequency can be distinguished from that of the body. The effect of the resonant pitches on the tone quality is briefly discussed, with reference to a few analyses obtained with the analyzer described at this meeting. Loading the bridge is shown to affect some of these resonant points; also the tension to which the whole instrument is subjected by the strings. Variations of the sound energy emitted in a definite direction with bow pressure, speed and distance from the bridge are given by graphs.