  We analyzed Chandra observations of three gravitational lenses, SBS0909+523,
FBQS0951+2635, and B1152+199, to measure the differential X-ray absorption and
the dust-to-gas ratio of the lens galaxies. We successfully detected the
differential X-ray absorption in SBS0909+523 and B1152+199, and failed to
detect it in FBQS0951+2635 due to the dramatic drop in its flux from the ROSAT
epoch. These measurements significantly increase the sample of dust-to-gas
ratio measurements in cosmologically-distant, normal galaxies. Using the larger
sample, we obtain an average dust-to-gas ratio of E(B-V)/NH = (1.5\pm0.5)e-22
mag cm^2/atoms with an estimated intrinsic dispersion in the ratio of \simeq
40%. This average dust-to-gas ratio is consistent with our previous
measurement, and the average Galactic value of 1.7e-22 mag cm^2/atoms and the
estimated intrinsic dispersion is also consistent with the 30% observed in the
Galaxy. A larger sample size is still needed to improve the measurements and to
begin studying the evolution in the ratio with cosmic time. We also detected
X-ray microlensing in SBS0909+523 and significant X-ray variability in
FBQS0951+2635.
