deletions | additions       diff --git a/Payam.tex b/Payam.tex  index 60f5eac..e225d8d 100644  --- a/Payam.tex  +++ b/Payam.tex 
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\item Payam has (equation 12) $v_{\rm DNA}=F_{\rm ext} \ln(\ell/d)/\eta\ell - \lambda E\ln(1+r_{\rm D}/d)/\eta$, which we use to calculate $t_{\rm D}$. He finds $t_{\rm D}\sim \ell\eta/E\lambda$ -- whence this simplification?  \end{enumerate}  \item Is the {\it elongated jet} derivation valid -- the integration may break the ``weak momentum injection'' assumption \cite[page 88]{1959flme.book.....L}.  \item Where does the {\it nonequilibrium} stuff happen? There is no mention of linear response or anything like that.  \end{enumerate}