Jones & Koberts. 



Phil. Mag. Ser. 6, Vol. 22, PL XIII. 



Fig. 12. 



Case V. 



(" = 4'3 amperes. 



Tig. 13. 



Case VI. ? = 4-44 amperes. 



Fig. 14. 



Case VII. ? = 2 # 4 amperes. 



Fig. 15. 



Case VII with motor interrupter. 



