GLOSSARY. 
Tonic. The key-tone., 
Tremolo. A note made to quiver or shake. 
Triad. A chord consisting of three tones—i.e., the 
tonic with its third and its fifth. 
Trill. A rapid alternation of two contiguous tones. 
Triplets. Three equal tones performed in the time of 
one beat. 
Vivace. Quickly ; sprightly. 
