EARCHLIGHTS. ELECTRIC A voltage across the arc is usually 50 volts, and the remainder of the voltage is absorbed by the resistance. It has not been found practical to use lower than 60 volts line voltage with good results; 100 volt^ to 125 volts is best. Mirror … ' quality. Thej are similar to are ground to the ' thrown bj them is a re- i .1 the wrvice well ?}) '■ L9 inch . inclusr fitted with Mangin • -' nch and larger ar< with Parabolic Rheostnis an aP- aFINCM CO.
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