Abstract: An apparatus for dosing a fragile bulk material has a supply bin having an inclined wall formed with a throughgoing aperture and a filler for maintaining the supply bin filled with the bulk material up to a level below and not above the aperture. Thus the wall aperture is always above the level of the material. A slider formed with a throughgoing aperture like the wall aperture is slidable along the wall between a lower position with the slider aperture wholly below the material level and out of alignment with the wall aperture and an upper position with the slider aperture above the level and aligned with the wall aperture. An actuator reciprocates the slider between its positions and thereby fills its aperture with a dose of the material in the lower position, moves the dose up above the level while shedding material atop the slider on movement into the upper position, and drops the dose through the wall aperture when in the upper position.