deletions | additions       diff --git a/12 vs 13 [4].tex b/12 vs 13 [4].tex  index 3cd5c6c..9f7d05d 100644  --- a/12 vs 13 [4].tex  +++ b/12 vs 13 [4].tex 
...
The 12CO ^{12}CO  results now agree far better with the physical system than they did before. \subsection{Velocity}  While the uncorrected 12CO ^{12}CO  is poor at providing information about the mass, it can provide information about the velocity.