612 PROCEEDINGS OF THE AMERICAN ACADEMY. 



16. Atkins, Phys. Rev., 13, 102, 1901. 



Same method as Carhart (10, above). 



17. Bruger, Centrallblatt f. Akk. u. Elemt. etc., 2, 197, 1901. 



18. Dolazalek arid Gahl, Ztsch. f. Elektrochem., 7, 31, 1901. 



Most accurate and satisfactory method. 



19. Weber and Raberjot, Eclair. Electr., 31, 201, 1902. 



20. Ayres, Phys. Rev. 14, 17, 1902. 



Theory of bridge used by authors. 



21. Gates, Electrician, 50, 1058, 1903. 



Modified Kohlrausch method. 



