318 



THE INVISIBLE WORLD 



yard; b a spring; c a water pipe conveying wa- 

 ter from the spring to the seminary of learn- 

 ing, d. 



About 300 students attend the school. Among 



CX, 



FIG. ll - . 



them every term is much sickness, with an occa- 

 sional death. 



At length suspicion rests on the water. The 

 spring is about three-quarters of a mile from the 

 school, on much higher ground. On still higher 

 ground, about twenty yards above the spring, is 



