  The hadronic cascade description developed in an earlier paper is extended to
the response of an idealized fine-sampling hadron calorimeter. Calorimeter
response is largely determined by the transfer of energy $E_e$ from the
hadronic to the electromagnetic sector via $\pi^0$ production. Fluctuations in
this quantity produce the "constant term" in hadron calorimeter resolution. The
increase of its fractional mean, $f_{\rm em}^0 = \vev{E_e}/E$, with increasing
incident energy $E$ causes the energy dependence of the $\pi/e$ ratio in a
noncompensating calorimeter. The mean hadronic energy fraction, $f_h^0 =
1-f_{\rm em}^0$, was shown to scale very nearly as a power law in $E$: $f_h^0 =
(E/E_0)^{m-1}$, where $E_0\approx1$ GeV for pions, and $m\approx0.83$. It
follows that $\pi/e=1-(1-h/e)(E/E_0)^{m-1}$, where electromagnetic and hadronic
energy deposits are detected with efficiencies $e$ and $h$, respectively.
Fluctuations in these quantities, along with sampling fluctuations, are
incorporated to give an overall understanding of resolution, which is different
from the usual treatments in interesting ways. The conceptual framework is also
extended to the response to jets and the difference between $\pi$ and $p$
response.
