An interior rearview mirror assembly provides a display system for displaying light or information to a driver of a vehicle. In particular, a nonspermicidal lubricant containing such a polysaccharide increases the fertilization potential of the sperm during coitus, artificial insemination or sperm collection. 5 to 15 parts by weight of an ethylenically unsaturated carboxylic acid as a monomer, 5 to 40 parts by weight of an aromatic vinyl compound as amonomer, 5 to 40 parts by weight of an unsaturated alkyl carboxylate as a monomer and optionally not more than 69. The conveying lockhopper generally comprises a housing with inlet and outlet valves to receive and expel slag, respectively.