Abstract: A method for obtaining a plant, in particular a cultivated lettuce plant (L. sativa), with a lasting resistance to a pathogen, in particular Bremia lactucae, comprising of providing one or more specific DNA markers linked to one or more resistance genes, determining the presence of one or more resistance genes in a plant using these DNA markers, subsequently crossing a first plant comprising one or more resistance genes with a second plant comprising one or more resistance genes, and selecting from the progeny a plant in which one or more resistance genes are present by using the DNA markers. The invention further relates to the plants obtained with this method, seeds and progeny of these plants, as well as progeny thereof.

Abstract: A method for obtaining a plant, in particular a cultivated lettuce plant (L. sativa), with a lasting resistance to a pathogen, in particular Bremia lactucae, comprising of providing one or more specific DNA markers linked to one or more resistance genes, determining the presence of one or more resistance genes in a plant using these DNA markers, subsequently crossing a first plant comprising one or more resistance genes with a second plant comprising one or more resistance genes, and selecting from the progeny a plant in which one or more resistance genes are present by using the DNA markers. The invention further relates to the plants obtained with this method, seeds and progeny of these plants, as well as progeny thereof.

Abstract: The invention relates to electric lamps and more particularly to automotive signal lamps. Lead-free, cadmium-free, sulfate-refined glass compositions are described for use in electric lamps, which glass is amber colored and comprises no toxic or forbidden components which could be harmful to the environment such as lead oxide, antimony oxide, selenium or cadmium.

Abstract: The invention relates to electric lamps and more particularly to automotive signal lamps. Lead-free, cadmium-free, sulfate-refined glass compositions are described for use in electric lamps, which glass is amber colored and comprises no toxic or forbidden components which could be harmful to the environment such as lead oxide, antimony oxide, selenium or cadmium.

Abstract: A high intensity discharge lamp having a pair of discharge devices with one of them initially operative. The discharge devices are laterally adjacent with the higher temperature end of the operative discharge device proximate the lower temperature end of the inoperative discharge device for heating it during lamp operation. This facilitates starting of the inoperative discharge device after a momentary power interruption.

Abstract: A high intensity discharge lamp having a plurality of discharge device, and a starting aid for preferentially starting one of the discharge devices. Upon initial application of power to the lamp the preferentially started discharge device will start first, and the other discharge devices will not start. A power interruption during lamp operation will cause an interruption in the operation of the discharge device started first, upon reapplication of lamp power one of the other discharge devices that had not been operating will start without a hot restart delay.

Abstract: Ore pellets are delivered by a conveyor to the chain grate of a continuously operating baking plant, said pellets being supplied to the conveyor from a pellet former at a fluctuating rate independent of the speed of the conveyor. To afford as nearly constant a flow of the pellets to the baking plant as possible, the quantity of pellets about to be delivered by the conveyor at the delivery station is measured, more particularly by measuring the speed of the conveyor and weighing the conveyor load near said delivery station, and is represented by a first signal which is passed through a high-permeable filter and a proportional control means, to provide a second signal which is combined with a signal representative of a belt speed calculated for an average load, and applied to adjust the belt speed in the direction to maintain said flow as nearly constant as possible.