In the winter of 1948–49 a series of measurements was made at Ottawa in an attempt to verify, by experiment, the theoretical computations of J. W. Ryde for the intensity of backscattering of 3 cm. radio waves by snowflakes. The radiation backscattered from falling snow was measured, together with the actual mass of snow per cubic meter of atmosphere. Whenever possible the size distribution of the snowflakes was determined. Owing to the small number of snow-storms studied, firm conclusions cannot be drawn. However, the results obtained are in agreement with those predicted by Ryde, and provide useful practical information.