  Every non-erasing monoid morphism $\sigma: {\cal A}^* \to {\cal B}^*$ induces
a measure transfer map $\sigma_X^{\cal M}: {\cal M}(X) \to {\cal M}(\sigma(X))$
between the measure cones ${\cal M}(X)$ and ${\cal M}(\sigma(X))$, associated
to any subshift $X \subseteq {\cal A}^\mathbb Z$ and its image subshift
$\sigma(X) \subseteq {\cal B}^\mathbb Z$ respectively. We define and study this
map in detail and show that it is continuous, linear and functorial. It also
turns out to be surjective. Furthermore, an efficient technique to compute the
value of the transferred measure $\sigma_X^{\cal M}(\mu)$ on any cylinder $[w]$
(for $w \in {\cal B}^\mathbb Z$) is presented.
  Theorem: If a non-erasing morphism $\sigma: {\cal A}^* \to {\cal B}^*$ is
injective on the shift-orbits of some subshift $X \subseteq {\cal A}^\mathbb
Z$, then $\sigma^{\cal M}_X$ is bijective.
  The assumption on $\sigma$ that it is "injective on the shift-orbits of $X$"
is strictly weaker than "recognizable in $X$", and strictly stronger than
"recognizable for aperiodic points in $X$". The last assumption does in general
not suffice to obtain the injectivity of the measure transfer map
$\sigma_X^{\cal M}$.
