A method has been found for measuring the shear moduli and losses of elastomers in a range of frequencies of about 1 to 106, from 10 cps down. This method provides for large cyclic shear stresses and deformations without employing resonance methods. Only one sample is needed for a complete study, the frequency of stress being the only variable. The method gives results that fit the ``box‐distribution function'' developed by Kuhn and Kuenzle. Results for a series of elastomers show that such investigations are important in ascertaining the mechanical properties of elastomers in practice.