  In ORFEUS II spectra of the sdO star BD +39 3226 interstellar hydrogen and
deuterium is detected. From Ly alpha profile fitting and a curve of growth
analysis of the Lyman series of H I and D I we derive the column densities
N(H)=1.20(+0.28/-0.22)*10^20 cm^(-2) and N(D)=1.45(+0.50/-0.38)*10^(15)
cm^(-2). From the analysis of metal absorption lines in ORFEUS and IUE spectra
we obtain column densities for 11 elements. In addition, we examine absorption
lines of H_2 for rotational excitation states up to J=7. We find an H_2
ortho-to-para ratio of 2.5, the fractional abundance of molecular hydrogen has
a low value of log f=-4.08 for a total amount of N(H_2)=4.8(+2.0/-1.6)*10^15
cm^(-2). The column densities of the excitation states reveal a moderate
Boltzmann excitation temperature of 130 K and an equivalent excitation
temperature for the excited upper states due to UV pumping of <1800 K.
