The Magnetic Separation of Lines ee: 
Runge.’ I have accordingly tabulated the intervals from Professor 
Runge’s contribution, intervals from his previous contributions, 
and the intervals in the present substances, all in one table, which 
presents the matter more clearly than any verbal description. An 
interval multiplied by multiple “factors” (small whole numbers ) 
constitutes a type by Preston’s law. I have tried only to find rep- 
resentatives of Professor Runge’s types, rather than all the lines 
and all the substances of these types. By way of explanation, the 
value “a” in the following table corresponds to the separation of 
1.11 for present field strength, and is the separation designated, 
“normal triplet” by Professor Runge. This triplet gave him 
the value of 1.75>10'° for e/m (charge/mass) in the equation, 
a=Ad\/\M=(e/m) (H/47); ¢ is the velocity of light and H the 
field strength. With regard to these separations Professor Runge 
observes, 
_ “Die bisher beobachteten Komplizierten Zerlegungen von Spectrallinien 
im magnetischen Felde zeigen die folgende Eigentumlichkeit: Die Abstande 
der Komponenten von der Mitte sind Vielfache eines aliquoten Teil des 
normalen Abstandes “a@’’=A})/)\2=(e/m) (H/4mc). Sicher beobactet sind 
bisher die Teile a/2, a/3, a/4, a/5, a/6, a/7, a/11, a/12.” 
‘Physikalische Zeitschrifte 8, April 15, 1907. 
33 
