Abstract: A vertical glass melting furnace of the type having an inlet for raw materials at the top thereof, an outlet for molten glass at the bottom thereof, and a tabular electric resistance heating element for melting which is immersed at some level in molten glass, has at least one opening, and covers almost entirely the cross-section of the furnace at that level, the vertical glass melting furnace comprising a stirrer which extends from above the furnace and passes through the batch layer and the tabular heating element so that the stirrer brings about forced circulation for homogenization of the molten glass which has passed through the tabular heating element and stays in the region below the tabular heating element.

Abstract: An epoxy resin-bitumen material composition is prepared by mixing an epoxy resin and a bitumen material in the presence of a co-solubilizer represented by the general formula ##STR1## wherein R is hydrogen or a hydrocarbyl group having 1-9 carbon atoms, R' is an alkylene group having 2-3 carbon atoms, n is an integer 1-10 inclusive, and p and q are respectively an integer of 0-40 in average. The resulting composition is useful as a road pavement material, bonding material for railroad track ballast, anti-corrosion agent, etc. The cured product resulting from this composition is advantageous in that it has good heat resistance and free from bleeding.