We present radial and rotation ( v sin i ) velocity measurements , from UVES+VLT high resolution spectra of 61 stars in the blue horizontal branches ( HB ) of the Galactic globular clusters NGC 1904 ( M79 ) , NGC 2808 , NGC 6093 ( M80 ) , and NGC 7078 ( M15 ) .

The data reduction and the velocity determination , based on cross-correlation techniques , are discussed in detail .
Most of this database has been used by Recio-Blanco et al .
( 2002 ) in their analysis of the rotation velocity properties of blue HB stars .
Here we present additional data for NGC 2808 .
We confirm the results of the previous paper , in particular , a possible link between the HB jump and the abrupt change in the rotational velocity distribution around T _ { eff } \sim 11,500 K .