Dear Colleagues- The MACHO project has detected 2 candidate microlensing events in progress towards the Galactic bulge. Event 99-BLG-51 Star ID 121.22425.177 RA (J2000) 18:08:51.1 DEC (J2000) -30:24:35 V ~16.6 R ~15.8 A ~2.6 and rising on 31 Jul, expected peak of A ~3.3 near Aug 1.90 UT, duration 11 +/- 2 days. Event 99-BLG-52 Star ID 167.24043.2792 RA (J2000) 18:12:12.6 DEC (J2000) -26:35:12 V ~19.6 R ~19.0 A ~3 on 31 Jul, future behavior uncertain. Finding charts and lightcurves are available on the web page at http://darkstar.astro.washington.edu or ftp site darkstar.astro.washington.edu directories macho/Alert/99-*. If you wish to no longer receive these bulletins please notify us at macho@astro.washington.edu.