2r2 



THE INDUSTRIES OF ANIMALS. 



The lofty nest, or Termitarium, constitutes a hillock 

 in the form of a cupola. The interior arrangement is 

 very complicated, and at the same time very well 

 adapted to the life of the inhabitants. There are four 

 storeys in all, covered by the general exterior walls. 

 (Fig- 39') The walls of the dome are very thick ; at 

 the base they measure from sixty to eighty centimetres. 



Fig. 39. 



The clay in drying attains the hardness of brick, and 

 the whole is very coherent. The sentinels of herds of 

 wild cattle choose these tumuli as observatories and 

 do not break them down. The walls of this exterior 

 enceinte are hollowed by galleries of two kinds: some 

 horizontal and giving access from outside to all the 

 storeys; the others mounting spirally in the thickness 



