161 



April 1 2th, third day, practically the same result even when double the 

 amount of water was taken out ; results about the same. 



April 13th. 



Litre 



It was apparent from the sudden fall from litre i to litre 50 in number 

 of germs that the number in the first litre were due to development in 

 the well itself This is shown by tables in which every litre up to the 

 first ten was examined. 



April 1 6th, 1888. Litre 



The same day, six hours later, the well was again examined, and 

 gave — 



Litre i 6,800 



5 3,800 



" 10 620 



100 80 



