hydraulic fracturing sands; namely, processed monocrystalline silica used as a proppant in the oil and natural gas industries to assist flow from deep wells

CHEMICAL APPARATUS-NAMELY, A MEANS FOR COLLECTING SAMPLES AND DEPOSITING THEM IN CONTAINERS-NAMELY, A MOTORIZED COLLECTOR AND DISPENSER MOVING ON A RAIL MOUNTED ON A TRAY CONTAINING THE MATERIAL, SAID DISPENSER BEING ADAPTED TO FILL CONTAINERS ON A RACK LOCATED BELOW SAID TRAY