90 
EASTERN ETHIOPIA 
VII 
1 
It has been mentioned already that the term drum is 
usually restricted to sound-producing instruments in 
which a tense membrane, stretched across a hollow 
In Uganda drums are used instead of bells to call the congregations to 
Avorship. 
cylinder, is set in vibration by hand or stick. The 
peculiar booming of a drum can be produced without 
the aid of a stretched membrane. The Gordon College, 
Khartoum, possesses a specimen of the remarkable 
