**Table 4:** Equivalent widths of the H $\gamma$ and H $\delta$ absorption lines in the LSB regions.
Telescope	Region	Distance^a	Aperture^b	EW(H $\delta$ )^c	EW(H $\gamma$ )^c
MMT^d	a1	10.7	$1.5\times3.4$	$-5.53 \pm0.22$	$-4.92\pm0.23$
	a2	29.5	$1.5\times13.2$	$-8.89 \pm0.53$	$-6.07 \pm0.41$
4 m^e	a3	12.6	$2.0\times7.6$	$-8.28 \pm0.50$	$-5.71 \pm0.60$
	a4	22.6	$2.0\times2.8$	$-9.06 \pm0.63$	...

^a Distance in arcsec from the brightest H II region e1.
^b Aperture size $x \times y$ , where x is the slit width and y the size along the slit in arcsec.
^c In Å.
^d Slit orientation with position angle ${\rm PA} = 22^\circ$ .
^e Slit orientation with position angle ${\rm PA} = 48^{\circ}$ .

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