Two of these instruments open the third movement of an F-major concerto by entering on “F G F G A G F,” then the same motif on G. This instrument only appears in the fourth section of the Christmas Oratorio. Bach’s cantatas BWV 46, 67, and 162 call for the “da tirarsi” type of these instruments, likely distinguished by their tuning mechanism. This instrument plays a “D, high D, C-sharp, D, low D” solo accompanied by two bassoons in the “Quoniam tu solus sanctus” of the Mass in B minor. Two of these instruments play during the second of two trios bookending a polacca in the (*) fourth movement of J. S. Bach’s first Brandenburg Concerto. Anton Joseph Hampel, a player of this instrument, (-5[1])invented the use of crooks (-5[1])to change its transposing key and the use of hand-stopping to play (-5[1])notes chromatically. For 10 points, name this coiled brass instrument associated with hunting. ■END■ (10[2])