THE ROLLER CANARY 99 
In bell we always have the opened beak; in hollow 
bell, the beak is closed, or, at any rate, only very slightly 
open, the beak and throat space is hollowed out, and this 
means that the “tu” gains in volume and comes out as a 
full, round, hollow tour. The closer the beak is kept 
the more perfect the sound. 
The finest effect and the fullest tonality in this tour 
are produced when the bird, with closed beak, sounds a 
full “ti”? with a gently breathed consonant “1,” thus: 
“Vullullulli’’; hollow bell, with the ‘“h,’” thus: 
“ Huhththi,” is not commonly met with, but is not 
exactly a bad form. 
ON VALUING A TOUR 
The speed at which the syllables follow one another, 
the rate of delivery, is a point for consideration in 
valuing the tour as well as its tone quality; a vigorous 
delivery, with fast repetition of the syllables well con- 
nected together, is not tiresome, and will have scarcely 
any prejudicial effect on the tunefulness of the song, but 
a slow, dragging, tame delivery is wearisome and blunts 
the effect, the song losing thereby all freshness and 
animation. 
In this latter instance we have an example of so- 
called dragging Hollow Bell, which is not worth much. 
It is common to hear this tour opening out in correct 
time and then for a moment slowing down slightly in 
the middle of the delivery soon to launch out again fresh 
and free. This is a very agreeable variation, the effect 
being very pleasing. 
Hollow Bell, as also the Bell tour, may start with 
ce 2? 
the consonant “r,” peing quickly changed to the 
