Revolving cylinder method
The material is placed within a cylinder with at least one transparent face. The cylinder is rotated at a fixed speed and the observer watches the material moving within the rotating cylinder. The effect is similar to watching clothes tumble over one another in a slowly rotating clothes dryer. The granular material will assume a certain angle as it flows within the rotating cylinder. This method is recommended for obtaining the dynamic angle of repose, and may vary from the static angle of repose measured by other methods.
When describing the angle of repose for a substance, always specify the method used.
FOLLOWING TABLE CONTAINS THE ANGLE OF REPOSE OF FEW MATERIALS