Neutral hydrogen in the galactic halo.

Observations of 21 cm H I emission-line profiles have been made in 34 directions from l = 172° through 0° to l = 97° at high galactic latitudes and in 59 directions towards the LMC (b ≡ -33°) with the aim of detecting low-intensity halo features which may be compared with other element features of similar radial velocities detected by ultraviolet or optical absorption lines. Data are presented as spectra and tables. Using the H I column densities as references, the authors have estimated depletions in the abundances of calcium and sodium in the halo, spiral arms and the LMC disk. In one direction towards the LMC depletions in the halo features of carbon, nitrogen, oxygen, magnesium, aluminum, silicon and iron (from IUE data) have also been estimated.