  We present mm-wave observations obtained by the BOOMERanG experiment of
Galactic emission at intermediate and high (b < -20 deg) Galactic latitudes. We
find that this emission is well correlated with extrapolation of the IRAS-DIRBE
maps, and is spectrally consistent with thermal emission from interstellar dust
(ISD). The ISD brightness in the 410 GHz map has an angular power spectrum c_l
= A l^{-beta} with 2 < beta < 3. At 150 GHz and at multipoles ell \sim 200 the
angular power spectrum of the IRAS-correlated dust signal is estimated to be
l(l+1)c_l/2 pi = (3.7 \pm 2.9) uK^2. This is negligible with respect to the CMB
signal measured by the same experiment l(l+1)c_l/2 pi = (4700 \pm 540) uK^2.
For the uncorrelated dust signal we set an upper limit to the contribution to
the CMB power at 150GHz and l \sim 200 of l(l+1)c_l/2 pi < 3 uK^2 at 95% C.L. .
