Abstract: A novel device and method for playing a laser gun game in vehicles is disclosed. The novel device includes a laser gun, a vehicle having a motor, a receptor mounted on the vehicle to receive a laser gun laser, and an operatively connected to the motor of the vehicle to regulate the motor when the receptor is activated by a laser from the laser gun. The novel method includes the steps of firing the first laser gun at the receptor of the first vehicle to cause the motor in the first vehicle to increase speed; firing the first laser gun at the receptor of the second vehicle to cause the motor in the second vehicle to slow down; firing the second laser gun at the receptor of the second vehicle to cause the motor in the second vehicle to increase speed; firing the second laser gun at the receptor of the second vehicle to cause the motor in the first vehicle to slow down; and firing the first or second laser gun at receptors on a track to provide awards to the first or second player.

Abstract: A method of closing phosphorus furnace tapholes which comprises applying pneumatic pressure at the taphole opening to force molten material in the boretube back into the furnace and then introducing sand particles through the taphole to meet and effect solidification of incoming molten furnace material thereby sealing off the inner opening of the boretube and filling the remainder of the boretube with sand. Tapping is readily accomplished by blowing out the loose sand and breaking the inner seal of solidified furnace material.