Abstract: A dispenser for dispensing a dye and a lachrymator in a stream, comprising a housing defining a closed cavity, a bore extending from the cavity to the exterior of the housing, a spool valve defining a longitudinal axis, disposed in the bore and moveable between open and closed positions, the spool valve being operable from the exterior of the housing and a nozzle extending from the bore to the exterior of the housing, the spool valve with the bore defining a chamber with which the nozzle communicates, the spool valve sealingly engaging the bore, when in the closed position, on both sides of the chamber, to exclude communication between the chamber and the cavity and, when in the open position, permitting communication of the chamber with the cavity whereby when a lachrymator under pressure is present in the interior of the housing, the lachrymator will pass through said chamber to and through the nozzle.