JOUKNAL OF THE COLLEGE OF SCIENCl::, TOKYO IRirEmAL TJNIVEKSITY, 



VOL. XLI., ARTICLE 7. 



Magnetic Separation of the Lines of Iron, Nickel 

 and Zinc in Different Fields. 



By 



Kogoro YAMADA, lii'iakKshi. 

 With 20 Plates. 



I. The Object of the Experiment. 



Zeeman,^-* taking the " molecular ciii'ient " of Ampere into 

 consideration, inferred that the outer components of triplets of 

 iron lines may differ in intensity. Experimentally, however, he 

 confirmed that there is no evidence of a directing influence of the 

 magnetic field on the orbits of the light-ions as Preston'^ believed. 

 Becquerel and Deslandres,'^ Reese, ^^ Hartmann, ^^ van Bilderbeek- 

 van Meurs, ^-* Arthur King'^ and Graftdijk^^ studied the magnetic 

 separations of iron lines and examined their characters with care; 

 but all these authors assumed that the separations of iron lines 

 are proportional to the strength of the magnetic fields. It is a 

 question whether we maj^ assume this proportionality in spite of 

 the disagreement of ~ of these lines with the value obtained b}^ 

 Lorentz's elementary theory. Professor Nagaoka, from a theore- 

 tical point of view, suggested that in many-lined spectra such as 



1) Zeeman, Astrophys. Journ., 9 (1899), p. 47. 



2) Preston, Phil. Mag., 45 (1898), p. 333. 



3) Becquerel et Deslandres, C. E., 126 (1898), p. 997. 



4) Reese, Astrophys. Journ., 12 (1900), p. 120. 



5) Hartmann, Dissertation, Halle (1907). 



6) Van Bilderbeek-van Meurs, Arch. Neerl., (2) 15 (1911), p. 353. 



7) Arthur King, Astrophys. Jour.. 31 (1910), p. 433 ; 34 (1911), p. 225 ; Carnegie Institute 

 Papers of the Mount Wilson Solar Observatory, 2 (1912), Part I. 



8) Graftdijk, Arch. Néerl., (3) 2 (1912) p. 192. 



