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We present an analysis of interstellar absorption along the line of sight tothe nearby white dwarf star HZ43A. The distance to this star is 68+/-13 pc, andthe line of sight extends toward the north Galactic pole. Column densities ofOI, NI, and NII were derived from spectra obtained by the Far UltravioletSpectroscopic Explorer (FUSE), the column density of DI was derived from acombination of our FUSE spectra and an archival HST GHRS spectrum, and thecolumn density of HI was derived from a combination of the GHRS spectrum andvalues derived from EUVE data obtained from the literature. We find thefollowing abundance ratios (with 2-sigma uncertainties): DI/HI = (1.66 +/-0.28) x 10^-5, OI/HI = (3.63 +/- 0.84) x 10^-4, and NI/HI = (3.80 +/- 0.74) x10^-5. The NII column density was slightly greater than that of NI, indicatingthat ionization corrections are important when deriving nitrogen abundances.Other interstellar species detected along the line of sight were CII, CIII,OVI, SiII, ArI, MgII, and FeII; an upper limit was determined for NIII. Noelements other than HI were detected in the stellar photosphere.Comment: 52 pages, 12 figures. To be published in the May ApJS 200

Abundances of Deuterium, Nitrogen, and Oxygen toward HZ 43A: Results from the FUSE Mission