  Normal-state resistance data from Bi_2Sr_2CaCu_2O_8 single crystals were
fitted to the (bi)polaronic conduction model, $R=R_0 (T+\sigma_b T^2)/(1+bT)$,
with satisfactory agreement over a wide temperature range. The fluctuating
conduction region is found to be much narrower than that in the usual sense, as
is the case for a charged Bose-gas. We estimate the effective (bi)polaron mass
to be ~ 4m_e.
