Abstract: A disperser of a powdery cloud which may be used to defeat infra-red sens used by enemy forces and an arrangement which will effectively and efficiently produce a cloud of powder for military applications.The disperser is provided with a barrel containing powder to which a cover is secured. The cover has an axial opening provided with an upper and lower cylindrical pipe section communicating therewith. A hollow elbow-like pysi is also secured to a second opening in the cover. Air is forced into the upper cylindrical pipe and travels down through the lower cylindrical pysi into the powder. This forced air carries the powder up to the elbow-like pipe and out into the atmosphere as a powdery cloud. Control of the dispersion process is by means of two slide-valves provided on the upper cylinder pysi.