Doping Dependence of the Chemical Potential in cuprate high T$_c$   superconductors II: (Bi,Pb)$_{2}$Sr$_{2}$Ca$_{2}$Cu$_{3}$%   O$_{10+\mbox{\small\protect\boldmath $\delta$}}$
  Using X-ray photoelectron spectroscopy, a systematic study is performed of the doping dependence of the chemical potential $\mu$ in two systems of (Bi,Pb)$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+\delta}$. The doping is varied by changing the O content of the sample. The measured shifts of the chemical potential are compared with present models for the doping behaviour of $\mu$ in high-$T_{\rm c}$ materials. VSGD.94.6.3 
G. Rietveld, S. J. Collocot, D. van der Marel