\begin{table}%t4
\caption{\label{Rvtab}$R_\lambda$ values and relative grain sizes.}
\small%\centerline
{
\begin{tabular}{l|ccccc}
\hline\hline 
Object&		$R_{\rm B}$&	$R_V$&	$R_R$&	$R_I$&		$\frac{<a>}{a_{\rm Gal}}$\\
(1)&   (2)&  (3)&  (4)& (5)&  (6)\\
\hline
NGC~524&	$4.46\pm 0.39$& $3.46\pm 0.16$&	$2.21\pm 0.47$&	$1.57\pm 0.45$&	$1.06\pm 0.02$\\
NGC~984&	$4.19\pm 0.36$& $3.19\pm 0.21$&	$2.43\pm 0.19$&	$2.06\pm 0.17$&	$1.08\pm 0.08$\\
NGC~1172&	$4.25\pm 0.17$& $3.25\pm 0.19$&	$2.39\pm 0.19$&	$1.95\pm 0.14$&	$1.07\pm 0.05$\\
NGC~1439&	$3.45\pm 0.21$& $2.45\pm 0.17$&	$2.01\pm 0.15$&	$1.76\pm 0.13$&	$0.93\pm 0.08$\\
NGC~2128&	$4.37\pm 0.28$& $3.37\pm 0.27$&	$2.06\pm 0.29$&	$1.59\pm 0.30$&	$1.04\pm 0.06$\\
NGC~2534&	$3.03\pm 0.19$& $2.03\pm 0.28$&	$1.61\pm 0.30$&	$1.18\pm 0.38$&	$0.80\pm 0.04$\\
NGC~2563&	$- $& 		$3.10\pm 0.00$&	$2.29\pm 0.74$&	$1.19\pm 0.51$&	$0.96\pm 0.03$\\
NGC~2672&	$4.27\pm 0.14$& $3.27\pm 0.28$&	$2.48\pm 0.14$&	$1.77\pm 0.15$&	$1.06\pm 0.02$\\
NGC~2693&	$4.46\pm 0.23$& $3.46\pm 0.26$&	$2.87\pm 0.45$&	$2.59\pm 0.36$&	$1.30\pm 0.04$\\
NGC~2907&	$3.25\pm 0.40$& $2.25\pm 0.48$&	$1.19\pm 0.29$&	$0.49\pm 0.23$&	$0.77\pm 0.03$\\
NGC~2911&	$3.84\pm 0.35$& $2.84\pm 0.29$&	$1.98\pm 0.31$&	$1.13\pm 0.37$&	$0.92\pm 0.04$\\
NGC~3078&	$4.10\pm 0.17$& $- $&		$2.39\pm 0.19$&	$-$&		$1.02\pm 0.03$\\
NGC~3489&	$4.38\pm 0.25$& $3.38\pm 0.21$&	$2.64\pm 0.19$&	$1.70\pm 0.15$&	$1.09\pm 0.02$\\
NGC~3497&	$- $& 		$3.10\pm 0.00$&	$- $&		$1.53\pm 0.65$&	$1.02\pm 0.02$\\
NGC~3585&	$4.45\pm 0.44$& $3.45\pm 0.33$&	$3.00\pm 0.24$&	$- $&		$1.17\pm 0.04$\\
NGC~3599&	$3.49\pm 0.15$& $2.49\pm 0.09$&	$2.12\pm 0.06$&	$1.57\pm 0.14$&	$0.93\pm 0.06$\\
NGC~3665&	$4.29\pm 0.20$& $3.29\pm 0.13$&	$2.33\pm 0.23$&	$-$&	                   $1.03\pm 0.02$\\
NGC~3923&	$4.16\pm 0.43$& $3.16\pm 0.39$&	$2.03\pm 0.16$&	$-$&	                   $0.98\pm 0.04$\\
NGC~4459&	$3.94\pm 0.24$& $2.94\pm 0.18$&	$2.26\pm 0.16$&	$-$&	                   $0.90\pm 0.02$\\
NGC~5363&	$3.78\pm 0.27$& $2.78\pm 0.16$&	$2.18\pm 0.36$&	$1.89\pm 0.28$&	$0.92\pm 0.04$\\
NGC~5525&	$4.15\pm 0.29$& $3.15\pm 0.17$&	$-$&	$-$&		$0.99\pm 0.01$\\
NGC~5898&	$4.15\pm 0.30$& $3.15\pm 0.46$&	$2.46\pm 0.29$&	$1.84\pm 0.41$&	$1.04\pm 0.03$\\
NGC~5903&	$4.07\pm 0.30$& $3.07\pm 0.22$&	$2.28\pm 0.39$&	$2.01\pm 0.34$&	$1.05\pm 0.08$\\
NGC~7432&	$3.89\pm 0.28$& $2.89\pm 0.21$&	$2.46\pm 0.19$&	$1.94\pm 0.22$&	$1.05\pm 0.09$\\
NGC~7722&	$3.89\pm 0.25$& $2.89\pm 0.20$&	$2.03\pm 0.14$&	$1.78\pm 0.10$&	$0.94\pm 0.02$\\
\hline
&	$R_U$~~~~~~~~~~~~~~~$R_{\rm B}$& $R_V$&	$R_R$& $R_I$&	 \\
NGC~5485& $4.38\pm 0.24$~~~~~$3.65\pm 0.21$& $2.65\pm 0.17$& $1.86\pm 0.12$& $1.40\pm 0.18$&  $0.92\pm 0.04$\\
\hline
{The Galaxy}&     4.10&          3.10&  2.27&  1.86& 1.00\\
\hline
\end{tabular}}
\smallskip
 Notes on Table~\ref{Rvtab}: Cols.~(2) to~(5) lists the $R_\lambda\ \left[{\equiv}\frac{ A_\lambda}{E(B-V)}\right]$ values with $\lambda= B,~ V,~ R$, and~$I$. Column~(6) lists the relative (mean) grain size in the program galaxies with respect to that responsible for the Galactic curve. NGC~5485 represents data in five bands ($U$, $B$, $V$, $R$  and~$I$). For comparison, Galactic $R_\lambda$ values are listed in the last row.
 %\vspace*{4mm}
\end{table}