  We used the Green Bank Telescope to detect molecular lines observed toward
Mid-Infrared (MIR) bubbles N62, N65, N90, and N117. The bubbles were selected
from Watson et al. (2016) who detected non-Gaussian CS (1-0) emission lines
toward the bubbles. Two of the bubbles are adjacent to infrared dark clouds
(IRDCs); we examined these sources for evidence of interaction between the
bubble rim and IRDC. The other two bubbles contain YSOs interior to the bubble
rim; in these sources we observed the gas near the YSOs. We detect CS (1-0)
emission toward all of the sources, and in several pointings the CS emission
shows non-Gaussian line shapes. HC$_3$N (5-4), C$^{34}$S (1-0), CH$_3$OH (1-0),
and SiO (v=0) (1-0) were also detected in some pointings. We calculate column
densities and abundances for the detected molecules. We compare the velocity of
optically-thick CS emission with the velocity of the other, optically thin
lines to look for evidence of infall. We find that even in pointings with
non-Gaussian CS emission, our detections do not support an infall model. We
interpret the kinematics of the gas in N62, N65, and N117 as likely evidence of
multiple clouds along the line of sight moving at slightly offset velocities.
We do not detect evidence of bubble rims interacting with IRDCs in N62 or N90.
The gas interior to bubbles appears more disrupted than the gas in the IRDCs.
N65 shows significantly stronger emission lines than the other sources, as well
as the most complicated non-Gaussian line shapes.

Astrophysics of Galaxies;Solar and Stellar Astrophysics