\ III, B, 6 



Barber: Examination of Artesian Wells 



445 



Table II. — Water from ivell opposite the municipal building, Meycatiayan, 



Bulacan Province. 



c 



1 



U 



1 



Nutrient medium. 







Result." 







20 hourB at 36°. 



40 hours at 36°. 



3 days at 36^. 



6 days. 3 at 

 room temper- 

 ature. 



5 



'5 



<: 



31 



OD 



O 



3 

 < 



BQ 01 



o 3 

 0.2 



J 





§1 



6i 



eg 

 O 



■3 



< 



oa 0) 

 .S 



ce. 



1 



6 

 1 

 5 

 1 

 5 

 R 



Glucose-broth fermentation 



tube 



do- 





 

 

 

 

 

 

 











 

 

 

 

 

 

 











 

 

 

 

 

 

 











 

 

 

 

 

 

 













(?) 

 (?) 





 

 

 















(b) 



(0 







(->) 







1 



do... 



Plftin agTBi' •- - 



























do.. 



Litmus- lactose agar 









 



? 









 



i "> 



Bile-lactose agar 



1 

 5 





Broth 1 cc - 







i 



Apparent 



.ly a 



pun 



1 , 

 J culture of a 







i 





z< 



M^loe 



a-for 



ming 



bact« 



irium 





" Amoeba test negative. 

 •> -f 3 ov more. 



"^ -t-4 or more. 

 ' 3 or more. 



In Table III is given a list of all the flowing wells examined 

 with a part of the data obtained from each. A complete exam- 

 ination was made of all of these, and some of them were ex- 

 amined twice ; but, as stated above, the results were so uniform 

 that it is not necessary to give them in detail. Under number 

 of colonies per cubic centimeter the entries "one or less," "two 

 or less," etc. mean that the maximum number found in any one 

 cubic centimeter sample was one or two, respectively. Where 

 "one or more" is entered, some very small number above one 

 was found in some tube where an exact determination was 

 difficult. In every water there was at least one of the 1 cubic 

 centimeter samples which remained sterile after five days or 

 more, and in most cases several samples of 5 cubic centimeters 

 remained sterile. 



