On Sol 54 (Sept. 30, 2012), Curiosity used two tools at the end of its arm to inspect two targets on an angular rock called "Bathurst Inlet." The rover had driven 7 feet (2.1 meters) the preceding sol to place itself within arm's reach of the targets.
Curiosity took close-up images of Bathurst Inlet with its Mars Hand Lens Imager (MAHLI), and took readings with the Alpha Particle X-Ray Spectrometer (APXS) to identify chemical elements in the target. MAHLI also inspected another location within reach, "Cowles."
A Sol 54 raw image from Curiosity's left Navigation Camera showing the arm at work at Bathurst Inlet is at http://1.usa.gov/NYUbz3 .
Sol 54, in Mars local mean solar time at Gale Crater, ended at 7:07 p.m. Sept. 30, PDT (10:07 p.m. EDT).