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We present the first results from an all-sky maser-line survey of symbioticMiras. Interferometric spectral-line observations of R Aqr and H1-36 Arae haverevealed a 22-GHz water maser in the former and 1612-MHz hydroxyl and weak22-GHz water maser emission from the latter. H1-36 has thus become the firstknown symbiotic OH/IR star. We have also detected weak OH line emission fromthe vicinity of R Aqr, but we note that there are small discrepencies betweenthe OH- and H2O-line velocities and positions. These detections demonstrateunequivocally that dust can shield some circumstellar hydroxyl and watermolecules from dissociation, even in systems which possess intense localsources of UV. Finally, we discuss some of the implications of theseobservations. The narrow profile of the water maser in R Aqr means that theremay finally be an opportunity to determine the system's orbital parameters. Wealso point out that high resolution synthesis observations may trace thedistribution of dust in H1-36 and R Aqr, possibly throwing light on themass-loss process in symbiotic Miras and placing constraints on the amount ofcollimation experienced by UV radiation from their hot, compact companions.Comment: 7 pages; no figures attached; LaTex (MN style); postscript figures  via anonymous ftp in /users/ers on astro.caltech.edu; University of Toronto  pre-print; ERSRJI

Discovery of OH and H2O masers in R Aquarii and H1 - 36 Arae