Line strengths for southern OB stars-II. Observations with moderate dispersion

From microphotometer tracings of prismatic spectrograms, the equivalent widths and central depths of H7 and H have been used to estimate the absolute visual magnitude for about 380 stars earlier than class A7, including over 6o class I supergiants. Similar data are also given for the helium singlet and triplet lines in the violet region for the 0 and B stars, and MK types are estimated.