472 



MEMOIES OF THE NATIONAL ACADEMY OP SCIENCES. 



Table YI. 



District and diite. 



LOWEE SCHITYLKILL. 



Direct pumpage, 

 Kov.ll 



Direct pumpage, 

 Nov. 28 



Direct pumpage, 

 Dec.17 



East Park, Nov. 15... 

 East Park, Nov. 30... 

 East Park, Dec. 20... 



UPPER SCHUYLKILL. 



High service, Nov. 23 . 

 High service. Dec. 3. . 



Chestnut HiU.Nov. 21 

 Chestnut Hill, Dec. 2. 



ChestnutHill,Jan.l4 



Chlorine. 



Mean. 



SO. 60 

 ■( .CO 



.45 

 .43 



.32 

 .33 



.425 



.415 



.550 



.410 



Oxygen con- 

 sumed. 



;0.17 

 .16 

 .18 



C .14 

 i .14 



1: 



.25 

 .24 



Mean, 



[ 0.170 



I .125 



I .225 



:\l I •"=» 



.23 



.20 



i .217 



.060 



Free ammonia. 



Tin Glass 

 tube. tube. 



0. 0020 



.0025 



.0019 



.0008 



0. 0018 



.0017 



.0023 



.0024 



.0016 



.0076 



Mean. 



Albuminoid ammonia. 



Tin Glass 

 tube, tube. 



.0109 



.0135 



0022 . 0102 



.0075 



.0171 



.0156 



.0162 



.0083 



.0153 



Nitrogen as 

 nitrates. 



.0082 



1.005 

 .060 



.110 

 .130 



.070 

 .070 



.055 

 .060 



.130 

 .140 

 .130 



.070 

 .070 

 .070 



.080 

 .080 

 .090 



.090 

 .090 

 .080 



.220 

 .220 



.100 

 .100 

 .100 



.110 

 .180 



.no 



.130 



Mean. 



.058 



\- 



087 



.100 



Bacteria in one 

 cubic centimeter. 



9,220 

 9, 380 

 3,510 

 6,200 



8,140 

 8, ISO 

 5, 8110 

 5,450 



i 19, 100 

 ) 26, 600 



4,130 



" 970 



100 



4,640 

 3, 8S0 

 7,550 

 4,750 



Mean. 



n 



7,0781 



6,893 



^ 22, 800 



s- 



18, 900 



' Agais, twenty-four hours thermostat. 



