392 
EASTERN ETHIOPIA 
XXXI 
that hard bodies such as bullets and spear-heads are 
occasionally found embedded in the solid parts of 
elephants’ tusks without any sign existing on the 
surface of the tusk to indicate the point of entry. 
Many observers, among them Blumenbach and Cuvier, 
noticed that the tissue in which foreign bodies are 
Iron ball surrounded by secondary 
dentine, embedded in the solid 
l)ortion of an elephant’s tusk. 
(Museum of the Ko 3 ^al College of 
Surgeons, 'England.) 
emliedded differs in appearance and texture from true 
ivory. Goodsir (1841) investigated the matter and 
furnished a satisfactory explanation. AVhen the ball 
hits the free portion of the tusk, if it only penetrates 
to a certain depth, no change takes place and the 
breach is not repaired. When the ball enters the pulp 
chamber through the side of the tusk, the hole in the 
