Proceedings of the American Academy of Arts and Sciences. 



Vol. L. No. 7. — January, 1915. 



CONTRIBUTIONS FROM THE JEFFERSON PHYSICAL 

 LABORATORY, HARVARD UNIVERSITY. 



THE INFLUENCE OF THE MAGNETIC CHARACTERISTICS 



OF THE IRON CORE OF AN INDUCTION COIL UPON 



THE MANNER OF ESTABLISHMENT OF A STEADY 



CURRENT IN THE PRIMARY CIRCUIT. 



By B. Osgood Peirce. 



