add some notes about turbulent heating rates.  I may have had them wrong by factors of a few b/c of an incorrect conversion between 3D and 1D velocity dispersion (overcorrection)?  But maybe not - sigma_3D = sqrt(3) sigma_1D, and sigma_3d^3 = sqrt(3)^3 sigma_1D^3, so all OK? (but the numerics don't precisely agree with MacLow '04 and some Krumholz paper which unfortunately I haven't found again)
add some notes about turbulent heating rates.  I may have had them wrong
by factors of a few b/c of an incorrect conversion between 3D and 1D
velocity dispersion (overcorrection)?  But maybe not - sigma_3D =
sqrt(3) sigma_1D, and sigma_3d^3 = sqrt(3)^3 sigma_1D^3, so all OK?
(but the numerics don't precisely agree with MacLow '04 and some
Krumholz paper which unfortunately I haven't found again)

keflavich/APEX_CMZ_H2CO,keflavich/APEX_CMZ_H2CO