We present a CCD survey of variable stars in the Draco dwarf spheroidal galaxy .
This survey , which has the largest areal coverage since the original variable star survey by Baade & Swope , includes photometry for 270 RR Lyrae stars , 9 anomalous Cepheids , 2 eclipsing binaries , and 12 slow , irregular red variables , as well as 30 background QSOs .
Twenty-six probable double-mode RR Lyrae stars were identified .
Observed parameters , including mean V and I magnitudes , V amplitudes , and periods , have been derived .
Photometric metallicities of the ab-type RR Lyrae stars were calculated according to the method of Jurcsik & Kovacs , yielding a mean metallicity of \langle [ Fe / H ] \rangle = -2.19 \pm 0.03 .
The well known Oosterhoff intermediate nature of the RR Lyrae stars in Draco is reconfirmed , although the double-mode RR Lyrae stars with one exception have properties similar to those found in Oosterhoff type II globular clusters .
The period-luminosity relation of the anomalous Cepheids is rediscussed with the addition of the new Draco anomalous Cepheids .