  We present a theoretical study of specific heat of bosons ($C_v$) in a simple
cubic lattice. We have studied the non-interacting bosons and the Tonks gas.
For both cases, the $C_v$ above the bose condensation temperature shows
considerable temperature dependence compared to that of free bosons. For Tonks
gas, we find that the low-temperature specific heat increases as the system
gets closer to the Mott transition.
