Abstract :
The alternating-current arc presents a wide field for research because of the many variable elements. During the last year the effect of the wave-form of electromotive force applied to the terminals of a standard enclosed arc-lamp, and the elements affecting the power-factor, were studied in connection with the graduating thesis work of Messrs. L. S. Billau, C. B. Gibson, E. H. LeTourneau, and R. Morris at the University of Minnesota. Some of the results obtained seem of sufficient interest for presentation before the Institute.
