  We present the optical spectroscopic study based on 41 spectra of 4 Her and
32 spectra of 88 Her, obtained over a period of 6 months. We estimate the
rotational velocity of these stars from He{\sc i} lines in the blue spectral
region (4000--4500 \AA). We find that these stars are likely to be rotating at
a fractional critical rotation of $\sim$ 0.80. We measure the average $I_p/I_c$
ratio to quantify the strength of the H$\alpha$ line and obtain 1.63 for 4 Her
and 2.06 for 88 Her. The radius of the H$\alpha$ emission region is estimated
to be $R_d/R_*$ $\sim$ 5.0, assuming a Keplerian disk. These stars are thus
found to be fast rotators with relatively small H$\alpha$ emission region. We
detect V/R variation of H$\alpha$ spectral line during the observed period. We
re-estimate the periods for both the stars and obtain two periods of $\sim$ 46
days and its harmonic of 23.095 days for 4 Her and $\sim$ 86 days for 88 Her.
As these two are shell stars with binaries and have low H$\alpha$ EW with the
emission region closer to the central star, the V/R variation and a change in
period may be an effect of the binary on the circumstellar disk.
