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22, On the Theory of Generalised Quanta and the 
Relativistic Newtonian Motion. 
By 8. C. Kar. 
ing to Planck a volume equal to h/, where h/ is Planck's 
constant. Rules are also given depending on what Planck has 
called coherence or incoherence of co-ordinates which determine 
the splitting up of the single quanta condition respecting the 
volume of the cell into f different conditions respecting the 
} (q, p)-planes. 
In the next volume of the Annalen? somewhat different 
conditions are laid down by Sommerfeld. According to Som- 
merfeld the elementary volume J nde, ... dg¢ dp, of phase- 
space may be regarded as determined by the f-projections 
J aa.av,, | 4a.dr., ne | dar dry on the f (q, p)-planes. 
Each of these integrals is then integrated with respect to p and 
then Sommerfeld proceeds to write— 
[ridq— | rota=t 
| pylg — i pidq=h, 
| eda ee | Prrda a h, 
| (pn—P }dq=nh. 
Assuming now that of the group of curves on the (q, p)- 
planes a path may be obtained such that along it | ~4q=9, 
Sommerfeld gets the simplified form d p,dqg=nh. For the limits 
of integration he gives the rule that it should be performed over 
that length of the orbit which brings up fresh phases in phase- 



1 Ann. d. Phys. L, p. 385 (1916). 
2 Ann. d. Phys. LI, p. 1 (1916). 
