Early quantum theory genesis in the intertheoretic context

Genesis of the early quantum theory represented by Planck's 1897-1906 and Einstein's 1905-1907 papers in intertheoretic context is considered. It is argued that in both cases the first quantum theoretical schemes were constructed as crossbreed ones composed from ideal models and laws of Maxwellian electrodynamics, Newtonian mechanics, statistical mechanics and thermodynamics. Deriving black-body radiation law Max Planck had to take the experimental evidence into account but it forced him not simply to deduce from phenomena but to use more theory also. Planck's and especially Einstein's theories represented the stages of ambitious programme of Maxwellian electrodynamics and statistical mechanics reconciliation.