There he learned a second instrument, the trumpet.
To play a second instrument at a high level, as Ms. Fischer does, demands impressive versatility.
A second instrument detected slow-moving neutrons, which indicate the presence of hydrogen in the polar regions.
And when Paul Lewis joined Cooper on a second instrument for the "Grand Duo", the point was reinforced.
Before the late 18th century sonatas for keyboard and a second instrument did not exist as we now know them.
The thin, oboe-like soprano sax, now adopted as a second instrument by countless jazz saxophonists and as a first instrument by a few, was introudced by Sidney Bechet.
Mr. Maxwell had a second instrument in his arsenal: the bagpipes, which he played for many years in New York City's St . Patricks Day parade as well as in the occasional studio session.
(As a sideline, or second instrument, he wrote nearly a hundred Profiles and book reviews for the magazine, the best of them wonderful studies of comedians like Mason and Bob and Ray).
The second instrument is a monitor that can detect one of those mysterious and violent explosions known as gamma ray bursts anywhere in the sky and then swing the telescope to look at it.
Using a second instrument on the satellite, one that measures altitude, Dr. Andrew Shepherd, a research fellow at the Center for Polar Observation and Modeling at University College London, came to similar conclusions.
But this summer, he trawled auction sites in search of a second instrument, settling on an anonymous Bohemian cello from around 1770 with generously sized f-holes and a 19th-century tailpiece.
