486 



J. C. BRANNER GEOLOGIC WORK OF ANTS 



eaves, and sheltering the body of the hill from rain. To estimate the amount 

 of earth per acre raised from the water-line of the subsoil by white ants 



Figure 9. — Mound of ^Vhite Ants in the laterite Region of Africa 



Redrawn from "II Ruwenzori," parte scientifica, volume ii. Prof. Alessandro Roceati. 

 Petrografia e mineralogia. Milano, 1909, plate I, figure 1 



would not in some districts be an impossible task, and it would be found, 

 probably, that the quantity at least equalled that manipulated annually in 

 temperate regions by the earth-worm. 



"These mounds, however, are more than mere waste-heaps. Like the corre- 



