192 ERRATA 
posaP of a quite different theory of metallic conduction. According to 
his theory, a metal contains atoms which are in the nature of electrical 
doublets which will orient themselves parallel to any appHed electrical 
field. These atoms are assumed to have the power of ejecting electrons 
in the same direction as the axis of the doublet and hence the conducting 
process on the basis of this theory consists in a tendency for orientation 
of the doublets under the action of the applied electromotive force and a 
consequent ejection of electrons from one atom to another in the direc- 
tion in which the current is known to flow. It seems very doubtful to 
us whether such a theory can be satisfactorily brought into agreement 
with our experimental results, since it would seem at first sight to be 
merely an accidental coincidence if the mechanical forces which we 
apply should produce an orientation in the right direction and of the 
right amount to give the pulse of electricity whose magnitude we have 
calculated on the basis of the other theory and actually found 
experimentally. 
CoUey, Ann. Physik., Leipzig, 17, 55 (1882). 
2 Des Coudres, Ibid., 49, 284 (1893) ; Ibid., 57, 232 (1896). 
3Tolman, Proc. Amer. Acad. Arts Sci., 46, 109 (1910); /. Amer. Chem. Soc, 33, 121 
(1911). 
* Tolman, Osgerby and Stewart, /. Amer. Chem. Soc, 36, 466 (1914). 
^Maxwell, Treatise on Electricity and Magnetism, 3rd edition (1892), Vol. 2, pp. 211 
et seq. 
^ Lodge, Modern Views of Electricity, 3rd edition (1907), p. 39. 
' Nichols, Physik. Zs., 7, 640 (1906). 
8 Tolman, Osgerby and Stewart, loc. cit. 
9 Thomson, Phil. Mag., 30, 192 (1915); Richardson, Ibid., 30, 295 (1915). 
Errata: In Mr. T. W. Vaughan's article, pages 98 and 99, the familiar percentage sign 
(%) was printed in place of the per-thousandths sign (7oo), following figures for the salin- 
ity; the salinities as printed are therefore ten times too large. 
